Mix a Solution That Is 60% Acid with a Solution

Multiple Choice

Mix a solution that is 60% acid with a solution that is 90% water to make 15 L of a solution that is 30% acid. How much of each solution should you use?

A) So, mix 9 L of the 60% acid solution and 6 L of the 10% acid solution.
B) So, mix 1.5 L of the 60% acid solution and 13.5 L of the 10% acid solution.
C) So, mix 6 L of the 60% acid solution and 9 L of the 10% acid solution.
D) So, mix 4.5 L of the 60% acid solution and 10.5 L of the 10% acid solution.
E) So, mix 7.5 L of the 60% acid solution and 7.5 L of the 10% acid solution.