- A35
- B17
- C31
- D20
Step-by-Step Solution
A + B + C = 135, A + B = 80 and B + C = 86. So C = 135 − 80 = 55 and A = 135 − 86 = 49, giving B = 135 − 55 − 49 = 31 kg.
Answer: C) 31
The average weight of A, B and C is 45 kg. If the average weight of A and B is 40 kg and that of B and C is 43 kg, the weight of B (in kg) is:
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