Five coins are tossed at a time. Then, the probability of

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Five coins are tossed at a time. Then, the probability of obtaining at least one tail is

Total events = n (s) = 2⁵ = 32
n(E) of getting heads = 1
p(E) = 1/32
∴ n(E) = 1 - p(E) = 1 - 1/32 = 31/32