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 28% ryegrass, what percent of the weight of the mixture is from mixture X?
Pick one
A) 10% B) 20% C) 40% D) 50% E) 60%
28% is 3%-points above 25% and 12%-points below 40%.   Thus the ratio of mixture Y to mixture X is 4:1.   The percent of mixture X is 1/5 = 20%.   The answer is 20%.
<result>B</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 28% ryegrass, what percent of the weight of the mixture is from mixture X?