Selling an kite for Rs. 30, a shop keeper gains 30%. During a clearance sale, the shopkeeper allows a discount of 10% on the marked price. His gain percent during the sale is?	Options
A) 8%  B) 10%  C) 11%  D) 17%  E) 20%
Explanation:   Marked price = Rs. 30   C.P. = 100/130 * 30 = Rs. 23.07   Sale price = 90% of Rs. 30 = Rs. 27   Required gain % = 3.92/23.07 * 100 = 17%.   Answer: 17%
<result>D</result>
Selling an kite for Rs. 30, a shop keeper gains 30%. During a clearance sale, the shopkeeper allows a discount of 10% on the marked price. His gain percent during the sale is?