Test Preparation on NDA Model Paper Set-10
1.
If a coin is tossed three times, find the probability of getting exactly one head or two heads.
all, there are eight possible cases: {HHH, HHT, HTH, THH, TTH, THT, HTT, TTT} Of these, six are favorable, {HTT, THT, TTH, HHT, HTH, THH} Therefore the probability of getting one head or two heads are 6/8 = 3/4
