A dealer offers a discount of 10% on the marked price of

A dealer offers a discount of 10% on the marked price of an article and still makes a profit of 20%. If its marked price is ₹ 800, then the cost price of the article is :

Here , marked price = ₹ 800
On discount of 10% ,

S.P. of that article = 800 ×	90	= ₹ 720
	100

He still makes 20% profit

∴ C.P. of the article = 720 ×	100	= ₹ 600
	120

Second method to solve this question :
Here, r = 20% , D = 10% , M.P. = ₹ 800 , C.P. = ?

M.P.	=	100 + r
C.P.	=	100 − D

800	=	100 + 20
C.P.	=	100 − 10

C.P. =	800 × 90
	120

C.P. = ₹ 600