CEE Kerala Engineering CEE Kerala Engineering Solved Paper-2010

  • question_answer
    From 12 books, the difference between number of ways a selection of 5 books when one specified book is always excluded and one specified book is always included is

    A)  64                                         

    B)  118

    C)  132                       

    D)         330

    E)  462

    Correct Answer: C

    Solution :

    Required number of ways \[{{=}^{11}}{{C}_{5}}{{-}^{11}}{{C}_{4}}=\frac{11!}{5!6!}-\frac{11!}{4!7!}-\frac{11!}{4!7!}=132\]


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