-
If a shopkeeper sold a book with 20% profit after giving a discount of 10% on marked price. The ratio of cost price and marked price of the book is
-
- 6 : 5
- 5 : 6
- 3 : 4
- 2 : 3
Correct Option: C
Let the marked price of book = ₹ N
Selling price after 10% discount = 90N/100 = ₹ 9N/10
Profit = 20%
∴ Cost price of book = (9N/10) x (100N/120) = ₹ 3N/4
Hence, required ratio = 3N/4 : N = 3 : 4
