Multiple Choice Questions on Three unbiased coins are tossed What is the probability of getting at most two heads ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

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

Quantitative Aptitude ( CCS) Probability
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    Three unbiased coins are tossed. What is the probability of getting at most two heads?

    3/4

    Incorrect Answer

    7/8

    Correct Answer

    1/2

    Incorrect Answer

    1/4

    Incorrect Answer
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    Explanation:

    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)/n(S)=7/8.

    Hence,option 2 is the correct answer.

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