The monthly incomes of A and B are in the ratio 4:5, their expenses are in the ratio 5 : 6. If ‘A’ saves Rs.25 per month and ‘B’ saves Rs.50 per month, what are their respective incomes?
(A) Rs.230 and Rs.500
(B) Rs.340 and Rs.400
(C) Rs.400 and Rs.600
(D) Rs.400 and Rs.500
Correct Option is: D Let AA’s income be = 4x
AA’s expenses, therefore = 4x–25
Let BB’s income be = 5x
BB’s expenses, therefore = 5x–50
We know that the ratio of their expenses = 5:6
⇒24x−150=25x−250
⇒ Therefore, x=100
A’s income =4x=400 and B’s income =5x=500