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OPSC OAS Paper 2 GS 2021 Solved Paper

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Question : 63

Total: 80

Out of 30 students in a class, the average weight of 18 students is 20 kg and the average of remaining 12 students have average weight 25 kg. What is the average weight of all the 30 students of the class?

11 kg
20 kg
22 kg
23.5 kg

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