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3 July, 10:27

The ratio of boys to girls in a group is 7:1. If there are 54 more boys than girls, work out how many boys there are.

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  1. 3 July, 13:12
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    63 boys

    Step-by-step explanation:

    Given that the ratio of boys : girls = 7 : 1 = 7x : x (x is a multiplier), then

    7x = x + 54 (54 more boys than girls)

    Subtract x from both sides

    6x = 54 (divide both sides by 6)

    x = 9, hence

    number of boys = 7x = 7 * 9 = 63
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