Multiple Choice Questions on If a variable takes values 0 1 2 3 hellip n with frequencies 1 C n 1 C n 2 C n 3 hellip C n n r........... for NDA Exam Preparation

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Multiple Choice Questions

If a variable takes values 0 1 2 3 hellip n with frequencies 1 C n 1 C n 2 C n 3 hellip C n n r...........

Mathematics (NDA) Arithmetic progression
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    If a variable takes values 0, 1, 2, 3,…, n with frequencies 1, C(n, 1), C(n, 2), C(n, 3), … , C(n, n) respectively, then the arithmetic mean is -

    2n

    Incorrect Answer

    n + 1

    Correct Answer

    n

    Incorrect Answer

    n / 2

    Incorrect Answer
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    Explanation:

    Arithmetic mean will be between maximum value ‘n’ and minimum value ‘0’.

    Therefore it will be n / 2.

    By: Yachna
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