A coin is tossed twice what is the probability that at least one tail occurs?
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Solution
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When a coin is tossed twice the sample space is given by S={HH,HT,TH,TT} Let A be the event of the occurrence of at least one tail ⇒A={HT,TH,TT} ∴P(A)=n(A)n(S)=34
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