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