8 liters of a 25 percent solution of alcohol in water are mixed with 2 liters of a 12 percent alcohol in water solution. What is the percentage of alcohol in the new solution?  Choices:
A) 21.2%
B) 21.6%
C) 22.0%
D) 22.4%
E) 22.8%
The total amount of alcohol is 0.25(8) + 0.12(2) = 2.24 liters.   The percentage is 2.24 / 10 = 22.4 / 100 which is 22.4%   The answer is 22.4%.
<result>D</result>
8 liters of a 25 percent solution of alcohol in water are mixed with 2 liters of a 12 percent alcohol in water solution. What is the percentage of alcohol in the new solution?