Income and expenditure of a person are in the ratio 5 : 4. If the income of the person is Rs. 20000, then find his savings?	Choose the correct choice from the following answers.
A) rs . 3600  B) rs . 4000  C) rs . 3639  D) rs . 3632  E) rs . 3602

Rationale: "let the income and the expenditure of the person be rs . 5 x and rs . 4 x respectively . income , 5 x = 20000 = > x = 4000 savings = income - expenditure = 5 x - 4 x = x so , savings = rs . 4000 answer : b"
Answer: B