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 12 percent solution will be required?	Select the correct option
A) 18
B) 20
C) 24
D) 33.75
E) 42
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.b= 60-26.25= 
<gadget id="calculator">60-26.25</gadget>
<output>33.75</output>
33.75   Answer : 33.75
<result>D</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 12 percent solution will be required?