Jackie has two solutions that are 2 percent sulfuric acid and 12 percent sulfuric acid by volume, respectively. If these solutions are mixed in appropriate quantities to produce 60 liters of a solution that is 5 percent sulfuric acid, approximately how many liters of the 12 percent solution will be required?  Choose the correct choice from the following answers:
A) 18
B) 20
C) 24
D) 36
E) 42
let a=amount of 2% acid and b= amount of 12% acid.   Now, The equation translates to,   0.02a + .12b = .05(a+b)   but a+b= 60   therefore .02a + .12b = .05(60)   =&gt; 2a + 12b = 300   but b=60-a   therefore   2a+ 12(60-a) = 300   =&gt; 10a = 420   hence a = 42., B = 60-42= 
<gadget id="calculator">60-42</gadget>
<output>18</output>
18   18nswer :18
<result>A</result>
Jackie has two solutions that are 2 percent sulfuric acid and 12 percent sulfuric acid by volume, respectively. If these solutions are mixed in appropriate quantities to produce 60 liters of a solution that is 5 percent sulfuric acid, approximately how many liters of the 12 percent solution will be required?