The ratio of income of two persons is 2 ∶ 3 and the ratio of expenditure is 5 ∶ 9. If both of the two persons can save rupees 600 at the end of a month, then what is the monthly income of the first person?
1
Rs. 1,600
2
Rs. 1,200
3
Rs. 1,800
4
Rs. 2,000