a) 30 kg
b) 35 kg
c) 42.5 kg
d) 37.25 kg
Answer: d
Explanation: The total weight of (36 + 44) Students of A and B,
= (36 × 40 + 44 × 35) kg = 2980 kg.
Average weight of the whole class = $$\frac{{2980}}{{80}}$$ kg
Average weight = 37.25 kg
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