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:

67

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