A.  3500

B.  4000

C.  4050

D.  5000

1
Correct Answer :
4000
Explanation :

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

P + Q = (5050 x 2) = 10100 .... (i)

Q + R = (6250 x 2) = 12500 .... (ii)

P + R = (5200 x 2) = 10400 .... (iii)

Adding (i), (ii) and (iii), we get:  2(P + Q + R) = 33000  or   P + Q + R = 16500 .... (iv)

Subtracting (ii) from (iv), we get P = 4000

=> P's monthly income = Rs. 4000


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