Question
The average weight of 15 boys in a group is 48 kg. If
the collective weight of 12 girls in another group is 25% lower than that of the boys, what is the ratio of the average weight of a boy to that of a girl?Solution
Total weight of all boys = 15 X 48 = 720 kg So, total weight of all girls = 720 X 0.75 = 540 kg So, average weight of a girl = 540 Ć· 12 = 45 kg Required ratio = 48:45 = 16:15 Hence, option b.
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