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The ratio of boys to girls is 3:4 . If there are 16 girls, then there are _____ boys.

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QUESTION :

The ratio of boys to girls is 3 : 4. If there are 16 girls, then there are _____ boys.

ANSWER :

The ratio of boys to girls is 3 : 4 . If there are 16 girls, then there are 12 boys.

3 : 4 = n : 16

3 × 16 = 48

4 × n = 4n

48 ÷ 4n = 12

n = 12

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