Question

The average weight of A, B and C is 65 kg. If the average weight of A and B is 63.5 kg, and the average weight of A and C is 67.5 kg, then the weight of A (in kg) is:

• A. 67
• B. 65
• C. 68
• D. 60

Answer 1

Answer:

A. 67

A + B + C = 65 × 3 = 195 kg A + B = 63.5 × 2 = 127 kg A + B + C – (A + B) = 195 – 127 C = 68 kg A + C = 67.5 × 2 = 135 A + 68 = 135 A = 135 – 68 = 67 kg