The average monthly income of P and Q is Rs. 5050. The average monthly income of Q and R is Rs. 6250 and the average monthly income of P and R is Rs. 5200. The monthly income of P is:?
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The answer is Rs. 4000.
Solution:-
Let P, Q and R represent their respective monthly incomes.
=>P + Q = (5050 x 2) = 10100 .....1
=>Q + R = (6250 x 2) = 12500 ....2
=>P + R = (5200 x 2) = 10400 ....3
Adding 1,2 and 3, we get:-
2(P + Q + R) = 33000
=>P + Q + R = 16500 .... 4
Subtracting 2 from 4,we get:-
P = 4000
Solution:-
Let P, Q and R represent their respective monthly incomes.
=>P + Q = (5050 x 2) = 10100 .....1
=>Q + R = (6250 x 2) = 12500 ....2
=>P + R = (5200 x 2) = 10400 ....3
Adding 1,2 and 3, we get:-
2(P + Q + R) = 33000
=>P + Q + R = 16500 .... 4
Subtracting 2 from 4,we get:-
P = 4000
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