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

[Q]: Problem: what is the range of all the roots of | x ^ 2 - 4 | = x ?
[A]: 3


[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 ?
[A]: 4 / 


[Q]: Problem: a house wife saved $ 2.50 in buying an item on sale . if she spent $ 25 for the item , approximately how much percent she saved in the transaction ?
[A]:
9 %