In a class of 37 students, there are 22 girls. The average weight of these girls is 46 kg and the average weight of the whole class is 50 kg. What is the average weight (in kg) of the boys in that class? (Rounded off to 2 decimal places)
A.58.25
B.61.35
C.60.74
D.55.87✓ Correct
Explanation
Total class weight = 37×50 = 1850 kg. Girls' weight = 22×46 = 1012 kg. Boys' weight = 838 kg. Average for 15 boys = 838/15 ≈ 55.87 kg.
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