Task: Question Answering
Input (English): Problem: seed mixture x is 40 % ryegrass and 60 % bluegrass by weight ; seed mixture y is 24 % ryegrass and 75 % fescue . if a mixture of x and y contains 36 % ryegrass , what percent of the weight of the mixture is from mixture x ? 
Options: a ) 25 % , b ) 40 % , c ) 60 % , d ) 75 % , e ) 90 %
Output (English): d