A bag is available for Rs. 90. The shopkeeper allows a 10% discount on the marked price. What is the marked price of the bag?

Given: The selling price of the bag = Rs. 90

Discount Percentage = 10%

Let the marked price of the bag be Rs. x.

∴ Discount = Marked price – Selling price = Rs. (x – 90)

We know that,

Discount Percentage $=\frac{\mathrm{Discount}}{\mathrm{Marked} \mathrm{price}}\times 100$

⇒ $10=\frac{\mathrm{x}-90}{\mathrm{x}}\times 100$

⇒ 10x = 100x - 9000

⇒ 90x = 9000

⇒ x = 100

Therefore, the marked price of the bag is Rs. 100.