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If the ratio of boys to girls is 3:2 and there are 25 students in a class, how do you make equal ratios to show how many students in the class are boys and how many are girls?
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The ratio of 15 boys to 10 girls is equivalent to the ratio of 3:2

Explanation:

$5$ groups in the ratio $3:2$ implies that:

$5\times (3:2)$

$= (5\times 3):(5\times 2)$

$= 15:10$

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