The ratio of incomes of two person P1 and P2 is 5 : 4 and the ratio of their expenditures is 3 : 2. If at the end of the year, each saves Rs.1800, then what is the income of P1? Choose the correct choice from the following choices:
A) s . 800	B) s . 2400	C) s . 4000	D) s . 3200	E) s . 4500

Rationale: "let the income of p 1 and p 2 be rs . 5 x and rs . 4 x respectively and let their expenditures be rs . 3 y and 2 y respectively . then , 5 x – 3 y = 1800 … ( i ) and 4 x – 2 y = 1800 … … . . ( ii ) on multiplying ( i ) by 2 , ( ii ) by 3 and subtracting , we get : 2 x = 1800 - > x = 900 p 1 ’ s income = rs 5 * 900 = rs . 4500 answer : e"
Answer: E