Question

The average weight of A, B and C is 52 Kg. If the average age of A and B is 49 Kg and that of B and C is 56, then the average weight of A and C is:

• A. 54 Kg
• B. 58 Kg
• C. 49 Kg
• D. 51 Kg

Answer 1

The correct option is D 51 Kg

Sum of ages of A, B and C = $3\times 52=156$ Kg
Sum of ages of A and B = $2\times 49=98$ Kg
Age of C = 156-98 = 58 Kg
Sum of ages of B and C =$2\times 56=112$ Kg
Age of A = 156-112 = 44 Kg
Therefore, average of A and C = $\frac{58+44}{2}=51$ Kg