Task: Question Answering
Input (English): Problem: 3 pounds of 05 grass seed contain 1 percent herbicide . a different type of grass seed , 20 , which contains 20 percent herbicide , will be mixed with 3 pounds of 05 grass seed . how much grass seed of type 20 should be added to the 3 pounds of 05 grass seed so that the mixture contains 15 percent herbicide ? 
Options: a ) 3 , b ) 3.75 , c ) 4.5 , d ) 8.4 , e ) 9
Output (English): d