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JEE Main & Advanced Mathematics Probability Question Bank Definition of probability

  • question_answer
    From a book containing 100 pages, one page is selected randomly. The probability that the sum of the digits of the page number of the selected page is 11, is

    A)                 \[\frac{2}{25}\]    

    B)                 \[\frac{9}{100}\]

    C)                 \[\frac{11}{100}\]

    D)                 None of these

    Correct Answer: A

    Solution :

               Favourable ways \[\{29,\,92,\,38,\,83,\,47,\,74,\,56,\,65\}\]                 Hence required probability \[=\frac{8}{100}=\frac{2}{25}.\]


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