2016 · Q27
The annual incomes of two persons are in the ratio 9 : 7 and their expenses are in the ratio 4:3. If each of them saves ₹ 2,000 per year, what is the difference in their annual incomes?
Elementary MathematicsRatio and Proportion
- A₹ 4,000
- B₹ 4,500
- C₹ 5,000
- D₹ 5,500
Explanation
Let incomes be 9x and 7x; expenses are 9x−2000 and 7x−2000 with ratio 4:3. Then 3(9x−2000) = 4(7x−2000), giving x = 2000. The income difference is 2x = Rs 4,000, option A.