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JEE Main & Advanced Mathematics Permutations and Combinations Question Bank Definition of combinations, Conditional combinations, Division into groups, Derangements

  • question_answer
    The number of ways in which we can select three numbers from 1 to 30 so as to exclude every selection of all even numbers is

    A) 4060

    B) 3605

    C) 455

    D) None of these

    Correct Answer: B

    Solution :

    Required number of ways\[{{=}^{30}}{{C}_{3}}{{-}^{15}}{{C}_{3}}=3605\].


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