A shopkeeper earns a profit of 12% on selling a book at a 10% discount on the printed price. The ratio of the cost price to the printed price is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 45 : 56.
Let the cost price of the book be Rs. 100
The selling price of the book = 100 × (100 + 12)/100 = 112
Let the printed price = Rs. x
⇒ 90% of x = 112
⇒ x = 1120/9
The required ratio =100 : 1120/9 = 900 : 1120 = 45 : 56