The average monthly income of P and Q is Rs. 5050. The average monthly income of Q and R is Rs. 6250. The average monthly income of P and R is Rs. 5200. What will be the monthly income of P?

A) 3500

B) 4000

C) 4050

D) 5000

Let P, Q and R represent their respective monthly incomes. Then, we have:

P + Q = (5050 * 2) = 10100 — (i)
Q + R = (6250 * 2) = 12500 — (ii)
P + R = (5200 * 2) = 10400 — (iii)
Adding (i), (ii) and (iii), we get:
2(P + Q + R) = 33000 = P + Q + R = 16500 — (iv)
Subtracting (ii) from (iv), we get, P = 4000.
P’s monthly income = Rs. 4000

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