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JEE Main & Advanced Mathematics Probability Question Bank Definition of probability

  • question_answer
    Two dice are thrown together. If the numbers appearing on the two dice are different, then what is the probability that the sum is 6

    A)                 \[\frac{5}{36}\]    

    B)                 \[\frac{1}{6}\]

    C)                 \[\frac{2}{15}\]    

    D)                 None of these

    Correct Answer: C

    Solution :

                    Obviously numbers will be \[\left( \begin{matrix}    \text{I} & \text{II}  \\    5, & 1  \\    4, & 2  \\    2, & 4  \\    1, & 5  \\ \end{matrix} \right)\]. Hence required probability \[=\frac{4}{6\,\,.\,\,5}=\frac{2}{15}\].


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