A shopkeeper gains 17% after allowing a discount of 10%

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A shopkeeper gains 17% after allowing a discount of 10% on the marked price of an article. Find his profit percent if the articles are sold at marked price allowing no discount.

1. 30%
2. 23%
3. 27%
4. 37%

Correct Option: A

Let C.P of article = Rs. 100
M.P. of article = Rs. k
According to the question,

k × 90	= 117
100

⇒ k =	117 × 100	= Rs. 130
	90

marked price = k = Rs. 130
∴ On allowing no discount profit = 30%