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There are two sections A and B of a class, consisting of 36 and 44 students respectively. If the average weight of section A is 40kg and that of section B is 35kg, find the average weight of the whole class.
- A. 30 kg.
- B. 35 kg.
- C. 42.5 kg.
- D. 37.25 kg.
Answer: Option D
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