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

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

Problem: 33 1 / 3 % of 36 ?
12 number

Problem: find the probability that a number selected from numbers 1 , 2 , 3 , . . . , 40 is a prime number , when each of the given numbers is equally likely to be selected ?

12 / 40