# RS Aggarwal Solutions Class 7 Maths Chapter 21 Ex 21.1 (Updated For 2021-22)

RS Aggarwal Solutions Class 7 Maths Chapter 21 Ex 21.1: Be it your Class 7 Maths exam preparation or the class assignments, RS Aggrwal Solutions Class 7 Maths has got your back. Subject matter experts have designed well-explained solutions of RS Aggarwal Solutions Class 7 Maths Chapter 21 Ex 21.1 for your better understanding. The solutions are accurate, credible and as per the current CBSE Syllabus.

## RS Aggarwal Solutions Class 7 Maths Chapter 21 Ex 21.1 – Overview

The first exercise of RS Aggarwal Solutions Class 7 Maths Chapter 21 contains 13 problems that required the use of basic concepts of Mean.

The mean value is the average of the given data and can be calculated by dividing the total number of observations by the number of observations.

Assume that, in an information table, the value estimations of 10 apparel materials are provided. If we need to locate the mean of the costs, at that point add the costs of each garment material and divide the complete number by 10. It will bring about the average mean.

### Formula To Calculate Mean

Mean = The sum of the provided Data /The Total number of Data

To calculate the arithmetic mean for the set of given data, here you should start with adding all the data values (X) & then dividing the output by the number of values (n).

The symbol ” ∑ “is generally used for indicating the fact that we need to sum up the values. Hence, we achieve the beneath provided formula for calculating the mean (x̄) –

x̄ = ∑ x/n

This is the complete blog on RS Aggarwal Solutions Class 7 Maths Chapter 21 Ex 21.1. To know more about the CBSE Class 7 Maths exam, ask in the comments.

## FAQs on RS Aggarwal Solutions Class 7 Maths Chapter 21 Ex 21.1

### How many questions are there in the first exercise of RS Aggarwal Solutions Class 7 Maths Chapter 21?

There are 13 questions in the first exercise of RS Aggarwal Solutions Class 7 Maths Chapter 21.

### What are the questions of the first exercise of RS Aggarwal Solutions Class 7 Maths Chapter 21 based on?

The questions are based on the basic concepts of Mean.