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ATQ, Let the number of boys be y, then number of girls will (40-y) According to question- 3.5×y + 4.5× (40-y) = 156 180 – y = 156 Y = 180-156 = 24 Hence number of boys = 24, and number of girls = 40-24 = 16 Ratio = 24:16 = 3:2
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