Multiple Choice Questions on The average of the first seven multiplies of 9 is ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

The average of the first seven multiplies of 9 is ........

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    The average of the first seven multiplies of 9 is?

    20

    Incorrect Answer

    28

    Correct Answer

    19

    Incorrect Answer

    21

    Incorrect Answer
    Explanation:

    first seven multiplies of 9 is
    9,18,27,36,45,54,63
    sum of these number=9(1+2+3+4+5+6+7)
    =9(7(7+1)/2)
    =9(28)
    =252
    average=252/9
    =28

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