The marked price of an article is Rs. 1,500. If two successive discounts, each of x%, on the marked price is equal to a single discount of Rs. 587.40, then what will be the selling price of the article if a single discount of x% is given on the marked price?

Answer: Option D

Total discount % = $$\frac{587.40}{1500}$$  × 100 = 39.16%
It's mean discount will be more than 20%
When, we let discount 22% it's satisfied
22 + 22 - $$\frac{22\times 22}{100}$$  = 39.16%
So, discount = 22%
Cost price = $$\frac{1500\times 78}{100}$$  = 1170