<AptiCode/>

Question 223: Three unbiased coins are tossed. What is the probability of getting at most two heads?

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Here S = {TTT, TTH, THT, HTT, THH, HTH, HHT, HHH}Let E = event of getting at most two heads.Then E = {TTT, TTH, THT, HTT, THH, HTH, HHT}.P(E) =n(E)=7.n(S)8