# A coin is tossed two times. Find the probability of getting at most one head.

The possible outcomes, if a coin is tossed 2 times is

S = {(HH),(TT),(HT),(TH)}

n(S) = 4

Let E = Event of getting at most one head = {(TT),(HT),(TH)}

n(S) = 3

Hence, required probability

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