In the following questions, each question has four options (A), (B), (C) and (D). Choose the correct option and indicate your correct response.
A fruit seller bought some oranges at the rate of Rs. 20 for 5 and sold them at the rate of Rs. 20 for 4. His profit per cent is:

Options

A. 0.2
B. 0.25
C. 0.3
D. 0.75

Answer

B