The monthly incomes of A and B are in the ratio 3 : 4 and the ratio of their monthly expenditures is 2 : 3. If each saves ₹4000 per month, then what is the income of B?
Answer & explanation
Correct answer: option 3
A : B
Incomes 3 : 4
Expenditure 2 : 3
_________
-4000 -4000
Using the cross - multiplication method,
9r - 8r = (-4000 x 2) - (-4000 x 3)
r = 4000
Income of B = 4 x 4000 = ₹16000