Q. The average monthly income of A and B is ₹ 14000, that of B and C is ₹ 15600 and A and C is ₹ 14400. The monthly income of C is 

Explanation by: Parvesh Kanani

Given , The average monthly income of A and B = ₹ 14000
⇒ A + B = 28,000 ...(i)
The average monthly income of B and C = ₹ 15600
⇒ B + C = 31,200 ...(ii)
The average monthly income of A and C = ₹ 14400
⇒ C + A = 28,800 ...(iii)
Adding, 2(A + B + C) = 88000
⇒ A + B + C = 44000
From equation (i),
28000 + C = 44000
⇒ C = 44000 – 28000 = 16000