Final answer:
To calculate the gain percent, we need to calculate the cost price and the selling price. The gain percent is 10%, which is not one of the options given.
Step-by-step explanation:
To calculate the gain percent, we need to calculate the cost price and the selling price. The fruit seller buys lemons at 2 for a rupee, so the cost price of 5 lemons would be 5/2 rupees. The selling price of 5 lemons is 3 rupees.
To calculate the gain percent, we can use the formula:
Gain percent = ((Selling Price - Cost Price) / Cost Price) x 100
Gain percent = ((3 - (5/2)) / (5/2)) x 100
Simplifying the equation we get,
Gain percent = (1/10) x 100
Gain percent = 10%
Therefore, the gain percent is 10%, which is not one of the options given. So, none of the options given is correct.