Question
‘A’ and ‘B’ play a game in which a coin is tossed 4
times. ‘A’ wins if at least 3 heads appear. Find the probability that ‘A’ wins.Solution
Total number of outcomes = 2 4 = 16
3 heads = C(4,3) = 4
4 heads = C(4,4) = 1
Total favourable = 4 + 1 = 5
Probability that ‘A’ wins = 5/16
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