The monthly incomes of two persons are in the ratio 4:5 and their monthly expenditures are in the ratio of 7:9. If each saves BDT 50 per month, find their monthly income.

• ক 500 and 400
• খ 400 and 500 ✅ সঠিক উত্তর
• গ 00 and 600
• ঘ None of these