Answer: 150 boys
Step-by-step explanation:
3:7, the difference is 200.
Within the ratio, the difference is 4.
Thus, 200 ÷ 4 = 50.
Boys = 3 × 50 = 150
Girls = 7 × 50 = 350
The ratio is now 150:350, when simplified is 3:7.
There were 150 boys.
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