a) 3500
b) 4000
c) 4050
d) 5000
Answer: b
Explanation: Let P, Q and R represent their respective monthly incomes.
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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