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A coin is thrown 3 times .what is the probability that atleast one head is obtained?
Answers
Answered by
mathhelper
Simply exclude the prob of all tails
Prob(all tails) = (1/2)^3 = 1/8
So prob(at least 1 head) = 1 - 1/8 = 7/8
Prob(all tails) = (1/2)^3 = 1/8
So prob(at least 1 head) = 1 - 1/8 = 7/8
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