Question

A chemist needs 40 liters of 20% acid solution. She has containers of 10% solution and 40% solution.

How many liters of each should she combine to get the needed solution?

Select one:
a. 26 2/3 liters of the 10% solution, and 13 1/3 liters of the 40% solution
b. 26 liters of the 10% solution, and 14 liters of the 40% solution
c. 12 liters of the 10% solution, and 28 liters of the 40% solution
d. 20 liters of the 10% solution, and 20 liters of the 40% solution