Multiple Choice Questions on Three unbiased coins are tossed What is the probability of getting at least 2 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 least 2 heads ........

Quantitative Aptitude ( CCS) Probability
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    Three unbiased coins are tossed.What is the probability of getting at least 2 heads?

    1/4

    Incorrect Answer

    1/3

    Incorrect Answer

    1/2

    Correct Answer

    1/5

    Incorrect Answer
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    Explanation:

    Here S= {TTT, TTH, THT, HTT, THH, HTH, HHT, HHH}.

    Let E = event of getting at least two heads = {THH, HTH, HHT, HHH}.

    P(E) = n(E) / n(S) = 4/8= 1/2

    Hence, option 3 is the correct answer.

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