A 40-liter solution of alcohol and water is 5 percent alcohol. If 5.5 liters of alcohol and 4.5 liters of water are added to this solution, what percent of the solution produced is alcohol?	Choose the correct choice
A) 9% B) 11% C) 13% D) 15% E) 17%
The percent of alcohol in the solution is (0.05(40) + 5.5) / 50 = 7.5/50 = 15%   The answer is 15%.
<result>D</result>
A 40-liter solution of alcohol and water is 5 percent alcohol. If 5.5 liters of alcohol and 4.5 liters of water are added to this solution, what percent of the solution produced is alcohol?