JEE Main & Advanced Mathematics Permutations and Combinations Question Bank Definition of permutation, Number of permutations with or without repetition, Conditional permutations

  • question_answer
    Eleven books consisting of 5 Mathematics, 4 Physics and 2 Chemistry are placed on a shelf. The number of possible ways of arranging them on the assumption that the books of the same subject are all together is [AMU 2002]

    A) 4! 2!

    B) 11!

    C) 5! 4! 3! 2!

    D) None of these

    Correct Answer: C

    Solution :

    Possible ways =\[5!.4!.3!.2!\].


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