The number of times a fair coin must be tossed so that the probability of getting at least one head is at least 0.95 is
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no of toss should be 20
because there is only one case when all the possibilities are tails.
so possibility of at least one head will be 19/20 = 0.95
because there is only one case when all the possibilities are tails.
so possibility of at least one head will be 19/20 = 0.95
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