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JEE Main & Advanced Mathematics Probability Question Bank Conditional probability bayes theorem

  • question_answer
    In a single throw of two dice what is the probability of obtaining a number greater than 7,  if 4 appears on the first dice

    A)                 \[\frac{1}{3}\]       

    B)                 \[\frac{1}{2}\]

    C)                 \[\frac{1}{12}\]    

    D)                 None of these

    Correct Answer: B

    Solution :

                      Since 4 has appeared on the first, so we are required 4 or 5 or 6 on second dice.                 Hence required probability \[=\frac{3}{6}=\frac{1}{2}.\]


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