Multiple Choice Questions on The average of 7 consecutive numbers is 20 The largest of these numbers is ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

The average of 7 consecutive numbers is 20 The largest of these numbers is ........

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    The average of 7 consecutive numbers is 20. The largest of these numbers is :

    21

    Incorrect Answer

    23

    Correct Answer

    22

    Incorrect Answer

    24

    Incorrect Answer
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    Explanation:

    Let the numbers be x, x + 1, x + 2,  x + 3, x + 4, x + 5 and x + 6,
    Then   (x + (x + 1) + (x + 2) + (x + 3) + (x + 4) + (x + 5) + (x + 6)) / 7 = 20.
    or  7x + 21 = 140 or 7x = 119 or x =17.
    Latest number = x + 6 = 23.

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