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

  • question_answer
    If the best and the worst paper never appear together, then six examination papers can be arranged in how many ways

    A) 120

    B) 480

    C) 240

    D) None of these

    Correct Answer: B

    Solution :

    If the best and the worst appear always together, the number of ways\[5\ !\ \times 2\]. Therefore required number of ways\[\ 6\ !\ -5\ !\ \times 2=480\].

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