Solve the problem.
-A chemist needs 12 liters of a 50% salt solution. All she has available is a 20% salt solution and a 70% salt solution. How much of each of the two solutions should she mix to obtain her desired solution?
A) 6 liters of the 20% solution; 6 liters of the 70% solution
B) 3.6 liters of the 20% solution; 8.4 liters of the 70% solution
C) 4.8 liters of the 20% solution; 7.2 liters of the 70% solution
D) 2.4 liters of the 20% solution; 9.6 liters of the 70% solution

Question

Quizplus · Accepted Answer

To find the correct amounts, set up the equation: 0.2x + 0.7(12-x) = 0.5(12). Solving gives x = 4.8 liters of the 20% solution and 12 - x = 7.2 liters of the 70% solution.

Solve the Problem. -A Chemist Needs 12 Liters of a 50% Salt Solution