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31 December, 18:38

The ratio of boys to girls in a group is 7:1. If there are 66 more boys than girls, work out how many girls there are.

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  1. 31 December, 18:50
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    Boys-77

    Girls-11

    b=7g

    b=g+66

    g+66=7g

    (Subtract a g from both sides)

    66=6g

    girls=11
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