{"id":126487,"date":"2021-09-10T15:50:38","date_gmt":"2021-09-10T10:20:38","guid":{"rendered":"https:\/\/www.kopykitab.com\/blog\/?p=126487"},"modified":"2021-09-10T15:50:42","modified_gmt":"2021-09-10T10:20:42","slug":"rd-sharma-class-10-solutions-chapter-7-exercise-7-3","status":"publish","type":"post","link":"https:\/\/www.kopykitab.com\/blog\/rd-sharma-class-10-solutions-chapter-7-exercise-7-3\/","title":{"rendered":"RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 (Updated for 2021-22)"},"content":{"rendered":"\n<p><img class=\"alignnone size-full wp-image-126500\" src=\"https:\/\/www.kopykitab.com\/blog\/wp-content\/uploads\/2021\/09\/RD-Sharma-Class-10-Solutions-Chapter-7-Exercise-7.3.jpg\" alt=\"RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3\" width=\"1200\" height=\"675\" srcset=\"https:\/\/www.kopykitab.com\/blog\/wp-content\/uploads\/2021\/09\/RD-Sharma-Class-10-Solutions-Chapter-7-Exercise-7.3.jpg 1200w, https:\/\/www.kopykitab.com\/blog\/wp-content\/uploads\/2021\/09\/RD-Sharma-Class-10-Solutions-Chapter-7-Exercise-7.3-768x432.jpg 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<p><strong>RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3:\u00a0<\/strong>Students will learn how to calculate the arithmetic mean of a continuous frequency distribution in this exercise. The <a href=\"https:\/\/www.kopykitab.com\/blog\/rd-sharma-class-10-solutions-for-maths\/\"><strong>RD Sharma Class 10 Solutions<\/strong><\/a> presents students with a step-by-step answer to problems, ensuring that they have a good conceptual understanding. Students can also download the <a href=\"https:\/\/www.kopykitab.com\/blog\/rd-sharma-class-10-solutions-chapter-7-statistics\/\"><strong>RD Sharma Solutions for Class 10 Maths Chapter 7<\/strong><\/a> Exercise 7.3 in PDF format.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_47_1 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"ez-toc-toggle-icon-1\"><label for=\"item-69d01c751c4cc\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;direction:ltr;\"><svg style=\"fill: #000000;color:#000000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #000000;color:#000000\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input  type=\"checkbox\" id=\"item-69d01c751c4cc\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-visibility-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.kopykitab.com\/blog\/rd-sharma-class-10-solutions-chapter-7-exercise-7-3\/#download-rd-sharma-class-10-solutions-chapter-7-exercise-73-free-pdf\" title=\"Download RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 Free PDF\">Download RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 Free PDF<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.kopykitab.com\/blog\/rd-sharma-class-10-solutions-chapter-7-exercise-7-3\/#access-answers-to-rd-sharma-solutions-class-10-maths-chapter-7-exercise-73-important-question-with-answers\" title=\"Access answers to RD Sharma Solutions Class 10 Maths Chapter 7 Exercise 7.3- Important Question with Answers\">Access answers to RD Sharma Solutions Class 10 Maths Chapter 7 Exercise 7.3- Important Question with Answers<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.kopykitab.com\/blog\/rd-sharma-class-10-solutions-chapter-7-exercise-7-3\/#faqs-on-rd-sharma-class-10-solutions-chapter-7-exercise-73\" title=\"FAQs on RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3\">FAQs on RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.kopykitab.com\/blog\/rd-sharma-class-10-solutions-chapter-7-exercise-7-3\/#where-can-i-get-rd-sharma-class-10-solutions-chapter-7-exercise-73-free-pdf\" title=\"Where can I get RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 Free PDF?\">Where can I get RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 Free PDF?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.kopykitab.com\/blog\/rd-sharma-class-10-solutions-chapter-7-exercise-7-3\/#what-are-the-benefits-of-using-rd-sharma-class-10-solutions-chapter-7-exercise-73\" title=\"What are the benefits of using RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3?\">What are the benefits of using RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.kopykitab.com\/blog\/rd-sharma-class-10-solutions-chapter-7-exercise-7-3\/#how-is-rd-sharma-class-10-solutions-chapter-7-exercise-73-helpful-for-board-exams\" title=\"How is RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 helpful for board exams?\">How is RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 helpful for board exams?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"download-rd-sharma-class-10-solutions-chapter-7-exercise-73-free-pdf\"><\/span>Download RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 Free PDF<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div id=\"example1\" style=\"text-align: justify;\">\u00a0<\/div>\n<p style=\"text-align: justify;\"><style>\n.pdfobject-container { height: 800px;}<br \/>\n.pdfobject { border: 1px solid #666; }<br \/>\n<\/style><\/p>\n<p style=\"text-align: justify;\"><script src=\"https:\/\/www.kopykitab.com\/_utility\/js\/pdfobject.min.js\"><\/script><br \/><script>PDFObject.embed(\"https:\/\/www.kopykitab.com\/blog\/wp-content\/uploads\/2021\/09\/RD-Sharma-Solution-Class-10-Chapter-7-Exercise-7.3.pdf\", \"#example1\");<\/script><\/p>\n<p><a href=\"https:\/\/www.kopykitab.com\/blog\/wp-content\/uploads\/2021\/09\/RD-Sharma-Solution-Class-10-Chapter-7-Exercise-7.3.pdf\">RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3<\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"access-answers-to-rd-sharma-solutions-class-10-maths-chapter-7-exercise-73-important-question-with-answers\"><\/span>Access answers to RD Sharma Solutions Class 10 Maths Chapter 7 Exercise 7.3- Important Question with Answers<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Question 1.<br \/>The following table gives the distribution of total household expenditure (in rupees) of manual workers in a city.<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1942\/45021402684_bf06bcbcee_o.png\" alt=\"RD Sharma Class 10 Chapter 7 Statistics \" width=\"539\" height=\"155\" \/><br \/>Find the average expenditure ( in rupees ) per household.<br \/>Solution:<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4904\/45021402734_79875f6409_o.png\" alt=\"RD Sharma Class 10 Chapter 7 Statistics \" width=\"688\" height=\"497\" \/><\/p>\n<p>Question 2.<br \/>A survey was conducted by a group of students as a part of their environment awareness programme, in which they collected the following data regarding the number of plants in 20 houses in a locality. Find the mean number of plants per house.<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4845\/45021402804_1486196069_o.png\" alt=\"Statistics Class 10 RD Sharma \" width=\"637\" height=\"63\" \/><br \/>Which method did you use for finding the mean, and why ?<br \/>Solution:<br \/>Let assumed mean (A) = 7<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4886\/45021402844_67d5308a75_o.png\" alt=\"RD Sharma Class 10 Solutions Statistics \" width=\"671\" height=\"456\" \/><\/p>\n<p>Question 3.<br \/>Consider the following distribution of daily wages of 50 workers of a facotry.<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4850\/45021402874_b4d8c797a7_o.png\" alt=\"Statistics Class 10 RD Sharma \" width=\"654\" height=\"67\" \/><br \/>Find the mean daily wages of the workers of the factory by using an appropriate method.<br \/>Solution:<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4903\/45021402914_4536842c55_o.png\" alt=\"RD Sharma Class 10 Solutions Statistics \" width=\"679\" height=\"387\" \/><br \/>= 150 \u2013 4.80 = 145.20<br \/>Mean daily wages per worker = Rs. 145.20<\/p>\n<p>Question 4.<br \/>Thirty women were examined in a hospital by a doctor and the number of heart beats per minute recorded and summarised as follows. Find the mean heart beats per minute for these women, choosing a suitable method.<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4911\/45021402974_ec833722bb_o.png\" alt=\"RD Sharma Class 10 Solutions Chapter 7 Statistics \" width=\"660\" height=\"76\" \/><br \/>Find the mean of each of the following frequency distribution (5 \u2013 14)<br \/>Solution:<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1969\/45021402984_3c7a5ee9f0_o.png\" alt=\"RD Sharma Class 10 Solutions Chapter 15 Statistics Ex 15.3 4a\" width=\"669\" height=\"415\" \/><br \/>Hence heart beats per minute = 75.9<\/p>\n<p>Question 5.<br \/>Find the mean of each the following frequency distributions : (5 \u2013 14)<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4897\/45021403024_0665c2cddd_o.png\" alt=\"RD Sharma Class 10 Solutions Chapter 7 Statistics \" width=\"709\" height=\"55\" \/><br \/>Solution:<br \/>Let Assumed mean (A) =15<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1912\/45021403084_6edd57b3e8_o.png\" alt=\"RD Sharma Solutions Class 10 Chapter 7 Statistics \" width=\"550\" height=\"201\" \/><br \/><img src=\"https:\/\/farm5.staticflickr.com\/4832\/45021403124_e05a5e44da_o.png\" alt=\"Learncbse.In Class 10 Chapter 7 Statistics \" width=\"269\" height=\"81\" \/><\/p>\n<p>Question 6.<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4809\/45021403214_387c1d8531_o.png\" alt=\"Class 10 RD Sharma Solutions Chapter 7 Statistics \" width=\"695\" height=\"79\" \/><br \/>Solution:<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1938\/45021403254_6b45ae8cb8_o.png\" alt=\"RD Sharma Class 10 Pdf Free Download Full Book Chapter 7 Statistics \" width=\"578\" height=\"354\" \/><\/p>\n<p>Question 7.<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4868\/45021403334_2bd928d3fc_o.png\" alt=\"RD Sharma Class 10 Solution Chapter 7 Statistics \" width=\"695\" height=\"59\" \/><br \/>Solution:<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4860\/45021403434_4b214f0f40_o.png\" alt=\"RD Sharma Class 10 Solution Chapter 7 Statistics \" width=\"576\" height=\"298\" \/><\/p>\n<p>Question 8.<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4892\/45021403514_9ec3cae6d8_o.png\" alt=\"RD Sharma Class 10 Pdf Ebook Chapter 7 Statistics \" width=\"700\" height=\"64\" \/><br \/>Solution:<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4817\/45746326951_192ea3b4b0_o.png\" alt=\"RD Sharma Maths Class 10 Solutions Pdf Free Download Chapter 7 Statistics \" width=\"567\" height=\"368\" \/><\/p>\n<p>Question 9.<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1937\/45746327031_f0ff47d904_o.png\" alt=\"RD Sharma Maths Class 10 Solutions Pdf Free Download Chapter 7 Statistics \" width=\"698\" height=\"66\" \/><br \/>Solution:<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1948\/45696154802_39656f7f1e_o.png\" alt=\"RD Sharma Class 10 Book Pdf Free Download Chapter 7 Statistics \" width=\"574\" height=\"364\" \/><\/p>\n<p>Question 10.<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4875\/45746327151_22755245bb_o.png\" alt=\"RD Sharma Class 10 Book Pdf Free Download Chapter 7 Statistics \" width=\"696\" height=\"68\" \/><br \/>Solution:<br \/>Let assumed mean = 20<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1919\/45746327241_b141053d8a_o.png\" alt=\"Class 10 RD Sharma Chapter 7 Statistics \" width=\"568\" height=\"253\" \/><\/p>\n<p>Question 11.<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1930\/45746327301_eff4bb1271_o.png\" alt=\"Class 10 RD Sharma Chapter 7 Statistics \" width=\"701\" height=\"56\" \/><br \/>Solution:<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1934\/45746327391_eb7a2a7f07_o.png\" alt=\"RD Sharma Maths Class 10 Solutions Chapter 7 Statistics \" width=\"565\" height=\"329\" \/><\/p>\n<p>Question 12.<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1936\/45746327451_efd1d816a2_o.png\" alt=\"RD Sharma Maths Class 10 Solutions Chapter 7 Statistics \" width=\"562\" height=\"62\" \/><br \/>Solution:<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4806\/45746327511_8394d3f02e_o.png\" alt=\"RD Sharma 10 Class Solutions Chapter 7 Statistics \" width=\"558\" height=\"245\" \/><br \/><img src=\"https:\/\/farm5.staticflickr.com\/4882\/45746327601_b2b4608364_o.png\" alt=\"RD Sharma 10 Class Solutions Chapter 7 Statistics \" width=\"263\" height=\"113\" \/><\/p>\n<p>Question 13.<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4916\/45746327681_5093c0a473_o.png\" alt=\"RD Sharma Class 10 Textbook PDF Chapter 7 Statistics \" width=\"696\" height=\"63\" \/><br \/>Solution:<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4881\/45746327781_ab304f2ee9_o.png\" alt=\"RD Sharma Class 10 Textbook PDF Chapter 7 Statistics \" width=\"573\" height=\"290\" \/><\/p>\n<p>Question 14.<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4806\/45746327841_ac3f804df5_o.png\" alt=\"Maths RD Sharma Class 10 Solutions Chapter 7 Statistics \" width=\"695\" height=\"85\" \/><br \/>Solution:<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1934\/45746327901_302c4465af_o.png\" alt=\"Maths RD Sharma Class 10 Solutions Chapter 7 Statistics \" width=\"566\" height=\"367\" \/><br \/><img src=\"https:\/\/farm5.staticflickr.com\/4821\/45746327971_bc55fe7620_o.png\" alt=\"10th Maths Solution Book Pdf Chapter 7 Statistics \" width=\"218\" height=\"38\" \/><\/p>\n<p>Question 15.<br \/>For the following distribution, calculate mean using all suitable methods.<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1953\/45021404994_212ae1a0e8_o.png\" alt=\"RD Sharma 10 Chapter 7 Statistics \" width=\"361\" height=\"62\" \/><br \/>Solution:<br \/>Let assumed mean (A) = 12.5<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1936\/45021405104_1bc11d570e_o.png\" alt=\"RD Sharma 10 Chapter 7 Statistics \" width=\"573\" height=\"316\" \/><\/p>\n<p>Question 16.<br \/>The weekly observation on cost of living index in a certain city for the year 2004 \u2013 2005 arc given below. Compute the weekly cost of living index.<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4827\/45021405234_a7b95fdd1e_o.png\" alt=\"RD Sharma Class 10 Book Pdf Chapter 7 Statistics \" width=\"545\" height=\"136\" \/><br \/>Solution:<br \/>Let assumed mean (A)= 1650<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4863\/45021405304_5a4afa1233_o.png\" alt=\"RD Sharma Class 10 Book Pdf Chapter 7 Statistics \" width=\"687\" height=\"321\" \/><br \/>= 1650 + 13.46 = 1663.46<\/p>\n<p>Question 17.<br \/>The following table shows the marks scored by 140 students in an examination of a certain paper:<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4855\/45746328031_7ae7bb324b_o.png\" alt=\"Solution Of RD Sharma Class 10 Chapter 7 Statistics \" width=\"548\" height=\"71\" \/><br \/>Calculate the average marks by using all the three methods: direct method, assumed mean deviation and shortcut method.<br \/>Solution:<br \/>(i) Direct Method :<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1933\/45746328071_eb50ff1dd0_o.png\" alt=\"Solution Of RD Sharma Class 10 Chapter 7 Statistics \" width=\"456\" height=\"293\" \/><br \/>(ii) Shortcut Method:<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1928\/45746328131_c7a00ceb84_o.png\" alt=\"RD Sharma 10 Solutions Chapter 7 Statistics \" width=\"589\" height=\"414\" \/><br \/><img src=\"https:\/\/farm5.staticflickr.com\/4876\/45696156932_35e684d97a_o.png\" alt=\"RD Sharma 10 Solutions Chapter 7 Statistics \" width=\"669\" height=\"360\" \/><\/p>\n<p>Question 18.<br \/>The mean of the following frequency distribution is 62.8 and the sum of all the frequencies is 50. Compute the missing frequency \/ and (C.B.S.E. 2004)<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4888\/45746328301_8996f98225_o.png\" alt=\"RD Sharma Maths Book For Class 10 Solution Chapter 7 Statistics \" width=\"696\" height=\"63\" \/><br \/>Solution:<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4811\/45696157232_6e9931d9fd_o.png\" alt=\"RD Sharma Maths Book For Class 10 Solution Chapter 7 Statistics \" width=\"718\" height=\"478\" \/><br \/><img src=\"https:\/\/farm2.staticflickr.com\/1969\/45746328481_ae73618271_o.png\" alt=\"RD Sharma Class 10 Maths Chapter 7 Statistics \" width=\"286\" height=\"182\" \/><\/p>\n<p>Question 19.<br \/>The following distribution shows the daily pocket allowance given to the children of a multistory building. The average pocket allowance is Rs. 18.00. Find out the missing frequency.<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4859\/45746328531_6785951482_o.png\" alt=\"RD Sharma Class 10 Maths Chapter 7 Statistics \" width=\"620\" height=\"67\" \/><br \/>Solution:<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1974\/45021404904_c017984a9d_o.png\" alt=\"RD Sharma Mathematics Class 10 Pdf Download Free Chapter 7 Statistics \" width=\"506\" height=\"370\" \/><br \/>\u21d2 752 + 20p = 792 + 18p<br \/>\u21d2 20p- 18p = 792 \u2013 752<br \/>\u21d22p = 40<br \/>\u21d2p =\u00a0402<br \/>Hence missing frequency = 20<\/p>\n<div><ins data-ad-format=\"auto\" data-ad-client=\"ca-pub-7398766921532682\" data-adsbygoogle-status=\"done\" data-ad-status=\"filled\"><ins tabindex=\"0\" title=\"Advertisement\" aria-label=\"Advertisement\"><ins><iframe src=\"https:\/\/googleads.g.doubleclick.net\/pagead\/ads?client=ca-pub-7398766921532682&amp;output=html&amp;h=280&amp;adk=1731550593&amp;adf=2884902089&amp;pi=t.aa~a.1381849204~i.40~rp.4&amp;w=750&amp;fwrn=4&amp;fwrnh=100&amp;lmt=1627868342&amp;num_ads=1&amp;rafmt=1&amp;armr=3&amp;sem=mc&amp;pwprc=3683862639&amp;psa=1&amp;ad_type=text_image&amp;format=750x280&amp;url=https%3A%2F%2Fwww.learncbse.in%2Frd-sharma-class-10-solutions-chapter-7-statistics-ex-7-3%2F&amp;flash=0&amp;fwr=0&amp;pra=3&amp;rh=188&amp;rw=750&amp;rpe=1&amp;resp_fmts=3&amp;wgl=1&amp;fa=27&amp;adsid=ChEI8ITsiQYQvOSSg7SsppnvARJIABc2IdjqorcNWgtwebGw8jFJtKosx-HtlitjRmlkdO-c3fv-PzmQqHs_HnQmEMlOjhlD1yrP2TXkyc0sQ7OLe8f70yHvmPIZ&amp;uach=WyJXaW5kb3dzIiwiMTAuMCIsIng4NiIsIiIsIjkyLjAuNDUxNS4xNTkiLFtdLG51bGwsbnVsbCxudWxsXQ..&amp;tt_state=W3siaXNzdWVyT3JpZ2luIjoiaHR0cHM6Ly9hdHRlc3RhdGlvbi5hbmRyb2lkLmNvbSIsInN0YXRlIjo3fV0.&amp;dt=1631267222709&amp;bpp=2&amp;bdt=2995&amp;idt=2&amp;shv=r20210901&amp;mjsv=m202109080101&amp;ptt=9&amp;saldr=aa&amp;abxe=1&amp;cookie=ID%3Da6010a9e138bacfc-22d79aca0fc6005e%3AT%3D1613635056%3ART%3D1613635056%3AS%3DALNI_MYbSRz2HjBSV_VG57_dksd7PcIEJg&amp;prev_fmts=0x0%2C728x280%2C750x280%2C750x280%2C750x280%2C750x280%2C750x280%2C750x280&amp;nras=8&amp;correlator=1730394710349&amp;frm=20&amp;pv=1&amp;ga_vid=1919740788.1613635057&amp;ga_sid=1631267222&amp;ga_hid=1208424154&amp;ga_fc=0&amp;u_tz=330&amp;u_his=3&amp;u_java=0&amp;u_h=720&amp;u_w=1280&amp;u_ah=680&amp;u_aw=1280&amp;u_cd=24&amp;u_nplug=3&amp;u_nmime=4&amp;adx=62&amp;ady=14399&amp;biw=1263&amp;bih=577&amp;scr_x=0&amp;scr_y=12097&amp;eid=42530672%2C21067496%2C31062297&amp;oid=3&amp;psts=AGkb-H-JD8TM6kznpb9Z-MEPuGBFbYuumDIHyBZTskESkhSOjC4GWYMeOwf93adxOztQjb6_58N-DRcuu2Uu%2CAGkb-H8pGS7AsROd8YhMG47w0iwM5jmkn8bjGTR_BCq3sk8jAJKeEOTPAsEgsmZdK9wOq2XMrIXeJA0UElQg%2CAGkb-H8ZhFWMNTqpFpwY8F_bmfgKT44MuDyzrckzjsUQKpog4PXJ0ZnrNeAtkvQ8oMYlJ5sAR1yTEkRnkbJx%2CAGkb-H_HYqu0YOzNq4yzCcXtWShvk2LAZVeeCjaJxtR5kQhyNkN2DBoiqyW5BCt2UbKwcPyiktdoR8Wm6XFH%2CAGkb-H-wCnyi8Vk0c4yjA6kumF4WlVSm61NFZ-c4f3dzljSUlH3pE8zFi0gJLt-Zi-3UVSXzaOWSXwy1zbST%2CAGkb-H8rJ4WWMPyAj9Z6d8HWIj03I178JO6ntKLvnJZSQNHLCkKXvSr-BgXb3m_3g1gFuCofyNU5zUTam70z&amp;pvsid=198782756681770&amp;pem=867&amp;ref=https%3A%2F%2Fwww.learncbse.in%2Frd-sharma-class-10-solutions-chapter-7-statistics-ex-7-2%2F&amp;eae=0&amp;fc=1408&amp;brdim=0%2C0%2C0%2C0%2C1280%2C0%2C1280%2C680%2C1280%2C577&amp;vis=1&amp;rsz=%7C%7Cs%7C&amp;abl=NS&amp;fu=128&amp;bc=31&amp;jar=2021-09-10-09&amp;ifi=9&amp;uci=a!9&amp;btvi=7&amp;fsb=1&amp;xpc=18t4ci3ZKS&amp;p=https%3A\/\/www.learncbse.in&amp;dtd=17065\" name=\"aswift_8\" width=\"750\" height=\"280\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" sandbox=\"allow-forms allow-popups allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation\" allowfullscreen=\"allowfullscreen\" data-google-container-id=\"a!9\" data-google-query-id=\"COyUkoOQ9PICFYjREQgdfdsHIw\" data-load-complete=\"true\" data-mce-fragment=\"1\"><\/iframe><\/ins><\/ins><\/ins><\/div>\n<p>Question 20.<br \/>If the mean of the following distribution is 27, find the value of p.<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1935\/45021404924_a682bef16d_o.png\" alt=\"RD Sharma Mathematics Class 10 Pdf Download Free Chapter 7 Statistics \" width=\"696\" height=\"66\" \/><br \/>Solution:<br \/>Mean = 27<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4914\/44832472405_bfe33626a7_o.png\" alt=\"Answers Of RD Sharma Class 10 Chapter 7 Statistics \" width=\"517\" height=\"272\" \/><br \/>\u21d2 27 (43 +p) = 1245 + 15p<br \/>\u21d2 1161 + 21p = 1245 + 15p<br \/>\u21d2 27p -15p= 1245 \u2013 1161<br \/>\u21d2 12p = 84<br \/>\u21d2 p =\u00a08412<br \/>Hence p = 1<\/p>\n<p>Question 21.<br \/>In a retail market, fruit vendors were selling mangoes kept in packing boxes. These boxes contained varying number of mangoes. The following was the distribution of mangoes according to the number of boxes.<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1918\/44832472415_c7058c4cef_o.png\" alt=\"Answers Of RD Sharma Class 10 Chapter 7 Statistics \" width=\"545\" height=\"62\" \/><br \/>Find the mean number of mangoes kept in a packing box. Which method of finding the mean did you choose ?<br \/>Solution:<br \/>We shall apply the assumed mean deviation method<br \/>Let assumed mean (A) = 57<br \/>We shall choose the method of assumed mean deviation :<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4910\/44832472565_5573cfc00e_o.png\" alt=\"Class 10 RD Sharma Pdf Chapter 7 Statistics \" width=\"666\" height=\"292\" \/><br \/>= 57 + 3 x\u00a025100<br \/>= 57 +\u00a0316<br \/>= 57 + 0.1875 = 57.1875 = 57.19<\/p>\n<p>Question 22.<br \/>The table below shows the daily expenditure on food of 25 households in a locality<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1933\/44832472675_211a891e17_o.png\" alt=\"Class 10 RD Sharma Pdf Chapter 7 Statistics \" width=\"671\" height=\"65\" \/><br \/>Solution:<br \/>Let assumed mean (A) = 225<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1905\/45021405674_3163b94913_o.png\" alt=\"RD Sharma Class 10 Solutions Pdf Free Download Chapter 7 Statistics \" width=\"631\" height=\"331\" \/><br \/>\u2234 Mean expenditure on food = Rs. 211<\/p>\n<p>Question 23.<br \/>To find out the concentration of S02 in the air (in parts per million, i.e., ppm), the data was collected for 30 localities in a certain city and is presented below :<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4872\/45021405714_b3b41f04e9_o.png\" alt=\"RD Sharma Class 10 Solutions Pdf Free Download Chapter 7 Statistics \" width=\"412\" height=\"181\" \/><br \/>Find the mean concentration of S02 in the air.<br \/>Solution:<br \/>Let assumed mean (A) = 0.10<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1968\/45021405814_a7784e89b0_o.png\" alt=\"RD Sharma Class 10 Solutions Pdf Free Download Chapter 7 Statistics \" width=\"604\" height=\"94\" \/><br \/><img src=\"https:\/\/farm5.staticflickr.com\/4815\/45021405944_10d1800075_o.png\" alt=\"Answers Of RD Sharma Class 10 Chapter 7 Statistics \" width=\"613\" height=\"215\" \/><br \/>= 0.10 \u2013 0.00133 = 0.09867 = 0.099 (approx)<\/p>\n<p>Question 24.<br \/>A class teacher has the following absentee record of 40 students of a class for the whole term. Find the mean number of days student was absent.<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1907\/45021406024_bdd59fc874_o.png\" alt=\"Answers Of RD Sharma Class 10 Chapter 7 Statistics \" width=\"634\" height=\"65\" \/><br \/>Solution:<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4807\/45021406094_f76bc151f0_o.png\" alt=\"RD Sharma Class 10 Maths Chapter 7 Statistics \" width=\"480\" height=\"315\" \/><br \/>\u2234 Mean number of days a students was absent = 12.475<\/p>\n<p>Question 25.<br \/>The following table gives the literacy rate (in percentage) of 3\u00a7 cities. Find the mean<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4808\/45021406164_f262a6328f_o.png\" alt=\"RD Sharma Class 10 Maths Chapter 7 Statistics \" width=\"520\" height=\"65\" \/><br \/>Solution:<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1953\/45746329821_27bfe4bf9e_o.png\" alt=\"RD Sharma 10 Solutions Chapter 7 Statistics \" width=\"615\" height=\"137\" \/><br \/><img src=\"https:\/\/farm5.staticflickr.com\/4891\/45746329941_8d16b180ca_o.png\" alt=\"RD Sharma Class 10 Maths Chapter 7 Statistics \" width=\"611\" height=\"243\" \/><\/p>\n<p>Question 26.<br \/>The following is the cummulative frequency distribution (of less than type) of 1000 persons each of age 20 years and above. Determine the mean age.[NCERT Exemplar]<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4869\/45746330041_46866ee1c6_o.png\" alt=\"RD Sharma 10 Solutions Chapter 7 Statistics \" width=\"702\" height=\"95\" \/><br \/>Solution:<br \/>First, we make the frequency distribution of the given data and then proceed to calculate mean by computing class marks (x<sub>i<\/sub>), u<sub>i<\/sub>\u2019s and f<sub>i<\/sub>u<sub>i<\/sub>\u2018s as follows:<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4852\/45746330101_d6a7cf8b19_o.png\" alt=\"RD Sharma Class 10 Book Pdf Chapter 7 Statistics \" width=\"619\" height=\"447\" \/><br \/>= 45 + 6.3 = 51.3<br \/>Thus, the mean age is 51.3 years.<\/p>\n<p>Question 27.<br \/>If the mean of the following frequency distribution is 18, find the missing frequency.<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4829\/44832474025_1bf183cc0a_o.png\" alt=\"10th Maths Solution Book Pdf Chapter 7 Statistics \" width=\"708\" height=\"91\" \/><br \/>Solution:<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1953\/44832474095_0dab974bbc_o.png\" alt=\"10th Maths Solution Book Pdf Chapter 7 Statistics \" width=\"649\" height=\"575\" \/><\/p>\n<p>Question 28.<br \/>Find the missing frequencies in the following distribution, if the sum of the frequencies is 120 and the mean is 50.<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4908\/45021406754_26f94eb1fb_o.png\" alt=\"RD Sharma Class 10 Textbook PDF Chapter 7 Statistics \" width=\"701\" height=\"69\" \/><br \/>Solution:<br \/><img src=\"https:\/\/farm2.staticflickr.com\/1908\/45021406834_da6bbc0d89_o.png\" alt=\"RD Sharma Maths Class 10 Solutions Chapter 7 Statistics \" width=\"593\" height=\"142\" \/><br \/><img src=\"https:\/\/farm5.staticflickr.com\/4870\/45021406894_989bd47f4a_o.png\" alt=\"RD Sharma Class 10 Textbook PDF Chapter 7 Statistics \" width=\"690\" height=\"356\" \/><br \/>\u21d2 4+ f<sub>2<\/sub>\u00a0-f<sub>1<\/sub>\u00a0= 0<br \/>\u21d2 -f<sub>2<\/sub>+ f<sub>1<\/sub>\u00a0= 4 \u2026\u2026..(ii)<br \/>On adding Eqs. (i) and (ii), we get<br \/>\u21d2 2f<sub>1<\/sub>\u00a0= 56<br \/>\u21d2 f<sub>1<\/sub>= 28<br \/>Put the value of f<sub>1<\/sub>\u00a0in Eq. (i), we get<br \/>f<sub>2<\/sub>\u00a0= 52-28<br \/>\u21d2 f<sub>2<\/sub>\u00a0= 24<br \/>Hence, f<sub>1<\/sub>\u00a0= 28 and f<sub>2<\/sub>\u00a0= 24<\/p>\n<p>Question 29.<br \/>The daily income of a sample of 50 employees are tabulated as follows:<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4889\/45021406984_8aeb44e08b_o.png\" alt=\"RD Sharma Class 10 Book Pdf Free Download Chapter 7 Statistics \" width=\"579\" height=\"63\" \/><br \/>Find the mean daily income of employees. [NCERT Exemplar]<br \/>Solution:<br \/>Since, given data is not continuous, so we subtract 0.5 from the lower limit and add 0.5 in the upper limit of each class.<br \/>Now we first, find the class mark xt of each class and then proceed as follows:<br \/><img src=\"https:\/\/farm5.staticflickr.com\/4902\/45021407044_098ec97ee0_o.png\" alt=\"RD Sharma Class 10 Book Pdf Free Download Chapter 7 Statistics \" width=\"695\" height=\"224\" \/><br \/>\u2234 Assumed mean, a = 300.5<br \/>Class width, h = 200<br \/>and total observation, N = 50<br \/>By step deviation method,<\/p>\n<p><img src=\"https:\/\/farm2.staticflickr.com\/1917\/45021407084_dd2b0fe25d_o.png\" alt=\"RD Sharma Class 10 Pdf Ebook Chapter 7 Statistics \" width=\"242\" height=\"66\" \/><br \/>= 300.5 + 200 x\u00a0150\u00a0x 14<br \/>= 300.5 + 56 = 356.5<\/p>\n<p>We have provided complete details of RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3. If you have any queries related to <a href=\"https:\/\/www.cbse.gov.in\/\" target=\"_blank\" rel=\"noopener\"><strong>CBSE<\/strong><\/a>\u00a0Class 10, feel free to ask us in the comment section below.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"faqs-on-rd-sharma-class-10-solutions-chapter-7-exercise-73\"><\/span>FAQs on RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<div id=\"rank-math-faq\" class=\"rank-math-block\">\n<div class=\"rank-math-list \">\n<div id=\"faq-question-1631268294979\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><span class=\"ez-toc-section\" id=\"where-can-i-get-rd-sharma-class-10-solutions-chapter-7-exercise-73-free-pdf\"><\/span>Where can I get RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 Free PDF?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>You can get RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 Free PDF from the above article.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1631268440872\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><span class=\"ez-toc-section\" id=\"what-are-the-benefits-of-using-rd-sharma-class-10-solutions-chapter-7-exercise-73\"><\/span>What are the benefits of using RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>1. Correct answers according to the latest CBSE guidelines and syllabus.<br \/>2. The RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 is written in simple language to assist students in their board examination, &amp; competitive examination preparation.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1631268582308\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \"><span class=\"ez-toc-section\" id=\"how-is-rd-sharma-class-10-solutions-chapter-7-exercise-73-helpful-for-board-exams\"><\/span>How is RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 helpful for board exams?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"rank-math-answer \">\n\n<p>For self-evaluation, RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 provides solutions with thorough descriptions as per term limits specified by the Board. Students will gain valuable experience solving these problems, allowing them to complete the assignment on time.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3:\u00a0Students will learn how to calculate the arithmetic mean of a continuous frequency distribution in this exercise. The RD Sharma Class 10 Solutions presents students with a step-by-step answer to problems, ensuring that they have a good conceptual understanding. Students can also download the RD Sharma Solutions &#8230; <a title=\"RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 (Updated for 2021-22)\" class=\"read-more\" href=\"https:\/\/www.kopykitab.com\/blog\/rd-sharma-class-10-solutions-chapter-7-exercise-7-3\/\" aria-label=\"More on RD Sharma Class 10 Solutions Chapter 7 Exercise 7.3 (Updated for 2021-22)\">Read more<\/a><\/p>\n","protected":false},"author":238,"featured_media":126500,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":""},"categories":[73411,2985,73410],"tags":[3243,9206,73520,4388],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/posts\/126487"}],"collection":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/users\/238"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/comments?post=126487"}],"version-history":[{"count":5,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/posts\/126487\/revisions"}],"predecessor-version":[{"id":126570,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/posts\/126487\/revisions\/126570"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/media\/126500"}],"wp:attachment":[{"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/media?parent=126487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/categories?post=126487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kopykitab.com\/blog\/wp-json\/wp\/v2\/tags?post=126487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}