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20 June, 14:53

At a country concert, the ratio of the number of boys to the number of girls is 2:7. If there are 250 more girls than boys, how many boys are at the concert?

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  1. 20 June, 18:46
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    Boys : Girls = 2:7

    let the no. of boys be x

    so no of girls = 250+x

    so, x: (250+x) = 2:7

    x / (250+x) = 2/7

    7x = 500+2x

    7x-2x = 500

    x = 500/5 = 100
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