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1. 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
- A. 400 and 600
- B. 400 and 600
- C. 400 and 600
- D. 400 and 600
Answer: Option B
Explanation:
Let two persons=A ,B
Income of A=4x, income of B=5x, expenditure of A= 7y andfor B=9y
4x-7y=50………1
5x-9y=50………2
x=4 and y=5
income of A=4*100=400 and b=5*100=500
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