Two different solutions of alcohol with respective proportions of alcohol to water of 3:1 and 2:3 were combined. What is the concentration of alcohol in the new solution if the first solution was 2.5 times the amount of the second solution?	Choose the correct choice from the following options.
A) 62
B) 65
C) 68
D) 70
E) 72
SOL:   Lets assume that 25L of sol1 was mixed with 10L of sol2.   Alcohol in Sol1: 25*3/4 = 18.75L   Alcohol in Sol2: 10*2/5 = 4L   Total Alcohol in the mixed solution of 35L = 18.75 + 4= 
<gadget id="calculator">18.75 + 4</gadget>
<output>22.75</output>
22.75L   Alcohol concentration in the new sol: (22.75/35)*100= 
<gadget id="calculator">(22.75/35)*100</gadget>
<output>65</output>
65%   ANSWER:65
<result>B</result>
Two different solutions of alcohol with respective proportions of alcohol to water of 3:1 and 2:3 were combined. What is the concentration of alcohol in the new solution if the first solution was 2.5 times the amount of the second solution?