# The cost price of 18 articles is equal to the selling price of 15 The gain per cent is :

**Answer: (2) 20%**

**Explanation:-**

Let the cost price of an article be Rs.1

Then, the cost price of 15 articles = Rs. 15

Selling price of 15 article = Rs. 18

Profit = 18 – 15

= Rs. 3

So, the percentage of profit = 3 x 100/15

= 20%

Then, gain percent is 20%.

Hence, the correct is option (2) 20%.