A merchant allows a discount of 10% on marked price for

A merchant allows a discount of 10% on marked price for the cash payment. To make a profit of 17%, he must mark his goods higher than their cost price by

C.P. of article = ₹ 100
Let marked price of article p.

∴ p ×	90	= 117
	100

⇒ p =	117 × 100
	90

= ₹ 130 or 30% above the cost price.
2nd method to solve this question.
Here, r₁ = 10%, Gain % = 17%, r = ?

Gain % =	r ×(100 − r₁)	− r₁
	100

17 =	r × (100 − 10)	− 10
	100

27 =	r × 90
	100

r = 30%