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  1. Find the average of the square of first 5 consecutive odd numbers starting from 1 to 9, where the last odd number is 9.

    2. A.
    22
    B.
    11
    C.
    16
    D.
    33

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    Answer : Option D

    Explanation :


    The average of square of first n consecutive odd numbers starting from 1 to X, where the last odd number is X, is given by:
    =X(X+2)/3
    Here, X=9
    So, average =9(9+2)/3
    =9*11/3
    =99/3
    =33

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