By selling an Iron-box for Rs. 1000, 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? Choices: A) 5% B) 6% C) 12% D) 11% E) 8%
Explanation:   Marked price = Rs. 1000   C.P. = 100/120 * 1000 = Rs. 833.33   Sale price = 90% of Rs. 1000 = Rs. 900   Required gain % = 6.6/833.33 * 100 = 8%.   Answer: 8%
<result>E</result>
By selling an Iron-box for Rs. 1000, 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?