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First add 8 and 9 to get 17. Then divide 340 by 17 to get 20. Then times 20 by 8 to find the number of girls or times 20 by 9 to get the number of boys.

Number of girls: 160

Number of boys: 180

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Q: How do you find how many boys there are in a school of 340 students if you know the ratio is 8 to 9 girls to boys?
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