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12 March, 20:45

At a county the ration of the number of boy to the number of girls is 2:7. if there are 250 more girls than boys, how many boys are at the correct

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  1. 12 March, 21:21
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    Let b=boys and g=girls

    b/g=2/7

    b+250=g

    b+25 = (7/2b)

    5/2b=250

    b=100

    So there are 100 boys at the concert
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