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

  • question_answer
    How many numbers of five digits can be formed from the numbers 2, 0, 4, 3, 8 when repetition of digits is not allowed [MP PET 2000; Pb. CET 2001]

    A) 96

    B) 120

    C) 144

    D) 14

    Correct Answer: A

    Solution :

    Numbers are 2, 0, 4, 3, 8  Numbers can be formed      = (Total) - (those beginning with 0)      = 5! - 4! = 120 - 24 = 96.


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