Mathematics · Averages
The average weight of students in four classes A, B, C, and D is 60 kg. The average weights of students of the respective classes A, B, C, and D are 45 kg, 50 kg, 72 kg, and 80 kg. If the average weight of the students of classes A and B together is 48 kg, and that of classes B and C together is 60 kg, what is the ratio of the number of students in class A to that in class D?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 13 : 5
- 23 : 2
- 34 : 3✓
- 42 : 3
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4 : 3
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