Solution
Total number of boys = 20 + 15 + 25 + 10 + 35 + 20 = 125
Total number of girls = 10 + 15 + 10 + 15 + 20 + 30 = 100
=> Required ratio = $$\frac{125}{100}$$
= 5 : 4
=> Ans - (C)
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