The task is to generate the correct answer for a given math problem.

[EX Q]: Problem: by selling an article for $ 225 a person gains $ 75 . what is the gain % ?
[EX A]: 50 %

[EX Q]: Problem: 10 women can complete a work in 5 days and 10 children take 10 days to complete the work . how many days will 5 women and 10 children take to complete the work ?
[EX A]: 5

[EX Q]: Problem: a distributor sells a product through an on - line store , which take a commission of 20 % of the price set by the distributor . the distributor obtains the product from a producer at the price of $ 15 per item . what is the price that the buyer observers on - line if the distributor wants to maintain a 25 % profit on the cost of the item ?
[EX A]:
2