Seed mixture X is 40% ryegrass and 60% bluegrass by weight; seed mixture Y is 25% ryegrass and 75% fescue. If a mixture of X and Y contains 37% ryegrass, what percent of the weight of the mixture is from mixture X?
Choose one:
A) 20% B) 40% C) 50% D) 60% E) 80%
37% is 12%-points above 25% and 3%-points below 40%.   Thus the ratio of mixture Y to mixture X is 1:4.   The percent of mixture X is 4/5 = 80%.   The answer is 80%.
<result>E</result>
Seed mixture X is 40% ryegrass and 60% bluegrass by weight; seed mixture Y is 25% ryegrass and 75% fescue. If a mixture of X and Y contains 37% ryegrass, what percent of the weight of the mixture is from mixture X?