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27 January, 16:22

Sheryl's mean average on eight exams is 83.750. Find the sum of her scores.

A. 770

B. 670

C. 693

D. 686

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  1. 27 January, 16:29
    0
    The answer is B. 670

    The mean average (X) is sum (s) of the values divided by the number of values n:

    X = s / n

    X = 83.750

    n = 8

    s = ?

    s = X * n

    s = 83.750 * 8 = 670
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