4 liters of a 20 percent solution of alcohol in water are mixed with 5 liters of a 10 percent alcohol in water solution. What is the percentage of alcohol in the new solution?  Choose the most appropriate option: A) 14.4% B) 14.8% C) 15.2% D) 15.6% E) 16.0%
The total amount of alcohol is 0.2(4) + 0.1(5) = 1.3 liters.   The percentage is 1.3 / 9 = 13 / 90 which is about 14.4%   The answer is 14.4%.
<result>A</result>
4 liters of a 20 percent solution of alcohol in water are mixed with 5 liters of a 10 percent alcohol in water solution. What is the percentage of alcohol in the new solution?