Selling an kite for Rs. 30, a shop keeper gains 40%. During a clearance sale, the shopkeeper allows a discount of 10% on the marked price. His gain percent during the sale is?	Choose the correct option.
A) 8%	B) 10%	C) 11%	D) 15%	E) 26%
Explanation:   Marked price = Rs. 30   C.P. = 100/140 * 30 = Rs. 21.42   Sale price = 90% of Rs. 30 = Rs. 27   Required gain % = 5.57/21.42 * 100 = 26%.   Answer: 26%
<result>E</result>
Selling an kite for Rs. 30, a shop keeper gains 40%. During a clearance sale, the shopkeeper allows a discount of 10% on the marked price. His gain percent during the sale is?