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16 April, 21:11

In a group of 60 children there are three times as many boys as girls. how many girls are there

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  1. 16 April, 21:16
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    3 times as many boys as girls, so write it in the ratio 3:1 (Three boys for every one girl)

    Add up all the numbers in the ratio (3 + 1 = 4)

    Divide the total number of children (60) by the number you just worked out (4)

    Multiply the resulting number (60/4 = 15) by the ratio of girls (1)

    15 * 1 = 15, there were 15 girls in the class (And so 45 boys)
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