A fruit-seller buys lemons at 2 for a rupee and sells them at 5 three rupees. What is his gain percent?

- 10%
- 15%
- 20%
- 25%

**Answer**

Cost price of 1 lemon = ₹ (1/2) = ₹ 0.5

Selling price of 1 lemon = ₹ (3/5) = ₹ 0.6

So, profit = ₹ 0.1

Profit % = 0.1/0.5 × 100 = 20%

**The correct option is C.**