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

[EX Q]: Problem: each of the products produced yesterday was checked by worker x or worker y . 0.5 % of the products checked by worker x are defective and 0.8 % of the products checked by worker y are defective . if the total defective rate of all the products checked by worker x and worker y is 0.74 % , what fraction of the products was checked by worker y ?
[EX A]: 4 / 

[EX Q]: Problem: the number of positive integer solutions for the equation x + y + z + t = 30 is
[EX A]: 3654

[EX Q]: Problem: what is the rate percent when the simple interest on rs . 1600 amount to rs . 200 in 4 years ?
[EX A]:
3.125 %