If on a marked price, the difference of selling prices with

If on a marked price, the difference of selling prices with a discount of 30% and two successive discounts of 20% and 10% is ₹ 72, then the marked price (in rupees) is

Let the marked price be ₹ M.

∴ In case I, Selling Price = ₹	70M
	100

Single discount equivalent to successive discounts of 20% and 10%.

=		20 + 10 −	20 × 10		% = 28%
			100

∴ S.P. in this case =	72M
	100

∴	72M	−	70M	= 72
	100		100

⇒	2M	= 72
	100

∴ M =	72 × 100	= ₹ 3600
	2