2. Sample Papers
  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main Sample Paper-11

  • question_answer
    Three people each flip two fair coins. The probability that exactly two of the people flipped 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) \[=P(HTorTH)=1/2\] \[\Rightarrow \]\[p=q=\frac{1}{2}\]and\[r=2\] \[p(r=2){{=}^{3}}{{C}_{2}}{{\left( \frac{1}{2} \right)}^{2}}.\frac{1}{2}=\frac{3}{8}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner