One type of liquid contains 25 % of benzene, the other contains 30% of benzene. A can is filled with 6 parts of the first liquid and 4 parts of the second liquid. Find the percentage of benzene in the new mixture.  Choices
A) 28 %  B) 25 %  C) 30 %  D) 27%  E) 32%
Let the percentage of benzene =X   (30 - X)/(X- 25) = 6/4 = 3/2   =&gt; 5X = 135 or   X = 27 so,   required percentage of benzene = 27 %   ANSWER:27%
<result>D</result>
One type of liquid contains 25 % of benzene, the other contains 30% of benzene. A can is filled with 6 parts of the first liquid and 4 parts of the second liquid. Find the percentage of benzene in the new mixture.