There are two groups A and B of a class, consisting of 42 and 28 students respec

Question

There are two groups A and B of a class, consisting of 42 and 28 students respectively. If the average weight of group A is 25 kg and that of group B is 40 kg, find the average weight of the whole class.

Options:

A . 69 kg

B . 31 kg

C . 70 kg

D . 30 kg

Answer: Option B

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