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Qthe ratio of boys to girls in a class is 8:17

the ratio of boys to girls in a class is 8:17 . how many boys are there if total students are 375

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#1DominicAnswered at 2013-02-08 10:25:01
There are b boys an g girls in the class

b / g = 8 / 17

Multiply both sides by g

b = 8 g / 17

b + g = 375

8 g / 17 + g = 375

8 g / 17 + 17 g / 17 = 375

25 g / 17 = 375 Multiply both sides by 17

25 g = 375 * 17

25 g = 6375 Divide both sides by 25

g = 6375 / 25

g = 255

b = 375 - 255

b = 120
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