A Mixture of 10% Disinfectant Solution Is to Be Made

Multiple Choice

A mixture of 10% disinfectant solution is to be made from 14% and 7% disinfectant solutions. How much of each solution should be used if 70 gallons of 10% solution are needed?

A) 40 gallons at 14% solution, 30 gallons at 7% solution
B) 38 gallons at 14% solution, 32 gallons at 7% solution
C) 25 gallons at 14% solution, 45 gallons at 7% solution
D) 32 gallons at 14% solution, 38 gallons at 7% solution
E) 30 gallons at 14% solution, 40 gallons at 7% solution