Anonymous,Popular 365 Question

In a class, males are 4 less than females, and the ratio is 7/9 . What is the total class size?

Thanks in advance.

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3 months ago 2

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  1. Como

    Male________Female
    x - 4__________x

    [x - 4] / x = 7 / 9
    9x - 36 = 7x
    2x = 36
    x = 18

    18 females . 14 males
    Total is 32

  2. Anonymous

    7/9 = m/f = (f - 4) / f

    So 7f = 9(f - 4)
    7f = 9f - 36
    36 = 2f
    f = 18 and m = 14

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