Jackie has two solutions that are 4 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 4 percent solution will be required?	Choices: A) 18 B) 20 C) 24 D) 36 E) 26.25
let a=amount of 4% acid and b= amount of 12% acid.   Now, The equation translates to,   0.04a + .12b = .05(a+b)   but a+b= 60   therefore .04a + .12b = .05(60)   =&gt; 4a + 12b = 300   but b=60-a   therefore   4a+ 12(60-a) = 300   =&gt; 16a = 420   hence a = 26.25.   Answer : 26.25
<result>E</result>
Jackie has two solutions that are 4 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 4 percent solution will be required?