the average weight of a, b, c is 45 kg. if the average weight of a and b be 40

Question

the average weight of a, b, c is 45 kg. if the average weight of a and b be 40 kg and that of b and c be 40kg and that of b and c be 43kg, then the weight of b is ?

Options:

A . 31 kg

B . 32 kg

C . 33 kg

D . 34 kg

Answer: Option A
Explanation :

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