Selling an kite for Rs. 30, a shop keeper gains 20%. 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 answer.
A) 8%
B) 10%
C) 11%
D) 15%
E) 20%
Explanation:   Marked price = Rs. 30   C.P. = 100/120 * 30 = Rs. 25   Sale price = 90% of Rs. 30 = Rs. 27   Required gain % = 0.2/25 * 100 = 8%.   8%nswer: 8%
<result>A</result>
Selling an kite for Rs. 30, a shop keeper gains 20%. During a clearance sale, the shopkeeper allows a discount of 10% on the marked price. His gain percent during the sale is?