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In a class of 39 students, there are 26 girls. The average weight of these girls is 42 Kgs and the average weight of the full class is 48 kgs. What is the average weight (in kgs) of the boys in the class?

In a class of 39 students, there are 26 girls. The average weight of these girls is 42 Kgs and the average weight of the full class is 48 kgs. What is the average weight (in kgs) of the boys in the class? Correct Answer 60

Total weight of 26 girls = 42 × 26 = 1092 kg

Total weight of 39 students = 48 × 39 = 1872 kg

Total weight of (39 – 26) = 13 boys = 1872 – 1092 = 780

∴ Average weight of boys = 780/13 = 60 kg

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