Solution X is 30% chemical A and 70% chemical B by volume. Solution Y is 40% chemical A and 60% chemical B by volume. If a mixture of X and Y is 32% chemical A, what percent of the mixture is Solution X?  Choose the correct choice from the following.
A) 85% B) 80% C) 75% D) 70% E) 65%
The volume of the mixture be X+Y.   0.3X +0.4Y=0.32(X+Y)   X=4Y   X/(X+Y)=4/5=80%.   The answer is 80%.
<result>B</result>
Solution X is 30% chemical A and 70% chemical B by volume. Solution Y is 40% chemical A and 60% chemical B by volume. If a mixture of X and Y is 32% chemical A, what percent of the mixture is Solution X?