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 0.6%, what fraction of the products was checked by worker y?	Choose one:
A) 1/5  B) 1/4  C) 1/3  D) 2/5  E) 3/7
x: 0.5% is 0.1%-points from 0.6%.   y: 0.8% is 0.2%-points from 0.6%.   Therefore the ratio of products checked by y:x is 1:2.   Thus, worker y checked 1/3 of the products.   The answer is 1/3.
<result>C</result>
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 0.6%, what fraction of the products was checked by worker y?