Correct Answer - Option 2 : 25%
Given
Cost price of 25 books is equal to the selling price of 20 book
Formula used
Profit = {(SP - CP)/CP} × 100
Calculation
CP of 25 books is same as SP of 20 books
⇒ 25CP = 20SP
⇒ CP/SP = 20/25
⇒ Profit = 25 - 20 = 5
⇒ Profit% = (5/20) × 100
∴ Profit is 25%
