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

Question

Accepted Answer

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

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

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