1.  By selling an umbrella for ₹ 300, 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:
A. 7
B. 7.5
C. 8
D. 9

Answer: Option C

Explanation:

Marked price = ₹ 300

C.P. = 100/120 x 300 = ₹ 250

Sale price = 90% of ₹ 300 = ₹ 270

∴ Required gain % = 20/250 x 100 = 8%.