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 Cis 67.5 kg, then the weight of A (in kg) is:
Answer & explanation
Correct answer: option 1
A + B + C = 65 x 3 ------ 1
A + B = 63.5 x 2 ----------2
A + C = 2 x 67.5 ----------3
From Equation 2 & 3
2A + B + C = 262
B + C = 262 - 2A -------- 4
From Equation 1 & 4
A + 262 - 2A = 195
A = 67