A 50 ml after-shave lotion at 30% alcohol is mixed with 30 ml of pure water. What is the percentage of alcohol in the new solution?	Choose the correct choice from the following options.
A) 16.75%
B) 17.75%
C) 18.75%
D) 19.75%
E) None of these
The amount of the final mixture is given by   50 ml + 30 ml = 80 ml   The amount of alcohol is equal to the amount of alcohol in pure water ( which is 0) plus the amount of alcohol in the 30% solution. Let x be the percentage of alcohol in the final solution. Hence   0 + 30% 50 ml = x (80)   Solve for x   x = 0.1817 = 18.75%   Answer 18.75%
<result>C</result>
A 50 ml after-shave lotion at 30% alcohol is mixed with 30 ml of pure water. What is the percentage of alcohol in the new solution?