UP Police Constable Exam Model Paper 3

Given
Selling price of Piano = Rs.4000
Discount = 20%
Concept
Selling price = Market price - Discount
Calculation
Let the market price is Rs.x
Selling price = Market price - Discount
4000 = x - 20% of x
⇒ 4000 = 80x/100
⇒ x = (4000 × 100)/80
⇒ x = 5000
Selling price = 5000 - 30% of 5000
Selling price = 5000 - 1500
Selling price = Rs.3500
∴ Selling price is Rs.3500, if discount is 30%.