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JEE Main & Advanced Sample Paper JEE Main Sample Paper-8

  • question_answer
    Three people each flip two fair coins. The probability that executive two of the people Hipped one head and one tail, is

    A)  1/2                       

    B)  3/8

    C)  5/8                       

    D)  3/4

    Correct Answer: B

    Solution :

     \[n=3,P\](success) =P (HT or TH) = ½ \[\Rightarrow \]\[p=q=\frac{1}{2}\]and r =2 \[P(r=2){{=}^{3}}{{C}_{2}}{{\left( \frac{1}{2} \right)}^{2}}.\frac{1}{2}=\frac{3}{8}\]


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