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

  • question_answer
    In how many ways can 10 true-false questions be replied

    A) 20

    B) 100

    C) 512

    D) 1024

    Correct Answer: D

    Solution :

    Required number of ways are\[{{2}^{10}}=1024\], because every question may be answered in 2 ways.


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