Multiple Choice Questions on If a secretary and a joint secretary are to be selected from a committee of 15 members then in how m........... for Mathematics - All Exams Preparation

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Multiple Choice Questions

If a secretary and a joint secretary are to be selected from a committee of 15 members then in how m...........

Quantitative Aptitude (CDS) Permutation & Combination
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    If a secretary and a joint secretary are to be selected from a committee of 15 members, then in how many ways can they be selected?

    102

    Incorrect Answer

    95

    Incorrect Answer

    105

    Correct Answer

    120

    Incorrect Answer
    Explanation:

    Selection of 2 members out of 15 has 15C2 number of ways.
    Therefore, the number of ways in which a secretary and a joint secretary are to be selected from a committee of 15 members is = 15C2
    = 15!/2!13!
    = 15×14/ 2

    By: bhavesh kumar singh
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