The ratio of boys to girls in a group is 5:3. If there are 22 more boys than girls, work out how many girls there are.
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The explanation is much longer than doing the mathematics. The ratio of 15 boys to 10 girls is equivalent to the ratio of ...
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Let the number of boys and girls to be 5x and 3x respectively.
Therefore,
Or, 3x + 22=5x.
Or,22=5x-3x
Or,22=2x
Or,x=22÷2
So,x=11
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