The marked price of an article is 20% above the cost price. After allowing x% discount on the marked price, a shopkeeper loses 10%. What is the value of x?

30 28 20 25

25

Let the cost price of the article= 100 Markup = 20% Then the marked price of the article = 120 Loss = 10% means, Selling price = 90% of the cost price = 90 Discount = 120 - 90 = 30 Discount % = 30 × \(\frac{100}{120}\) = 25%