Problema Solution
A druggist has two mixtures of a certain chemical and water, one containing 10% of the chemical and the other containing 40% of the chemical. How much of each mixture should he use to make 10 ounces that contain 25% of the chemical?
Answer provided by our tutors
Let amount of chemical=x ounces
Therefore,
x*0.10+(10-x)(0.40)=(10)(0.25)
0.1x+4-0.40x=2.5
-0.3x=-1.5
x=5
Druggist has to add 5 ounces of each mixture to get 10 ounces that contain 25% of the chemical.