JEE Main & Advanced Mathematics Probability Question Bank Use of permutations and combinations in probability

  • question_answer
    A bag contains 3 white and 5 black balls. If one ball is drawn, then the probability that it is black, is        [RPET 1995]

    A)   \[\frac{3}{8}\]                                   

    B)   \[\frac{5}{8}\]

    C)            \[\frac{6}{8}\]                          

    D)   \[\frac{10}{20}\]

    Correct Answer: B

    Solution :

               Required probability \[=\frac{{}^{5}{{C}_{1}}}{{}^{8}{{C}_{1}}}=\frac{5}{8}.\]


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