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At Chestatee Middle School, 120 students are in the choir. The ratio of girls to boys in the choir is 5:3. What is an equation that represents the number of boys in the chor in terms of of the number of girls?

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MrEquation
Answer: An equation to represent the number of boys could be:
b = (15/8)g

Since the ratio of boys to girls is 5:3, we should divide 120 by 8 (the combined total) so we can determine the number of boys and girls.

120 / 8 = 15

For the boys, 5 x 15 = 75
For the girls, 3 x 15 = 45

There are 75 boys and 45 girls in the choir. Now, we have to write an equation.

g x k = b
45 x K = 75
K = 75/45 or 15/8

Our final equation will be b = (15/8)g

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