Mixture A is 20 percent oil, and mixture B is 60 percent oil. If the two are poured together to create a 4-gallon mixture that contains 40 percent oil, approximately how many gallons of mixture A are in the mixture?
Answers
A) 1.0	B) 0.8	C) 0.7	D) 0.6	E) 0.5
(60-40)/(40-20) = Qa/Qb   20/20 = Qa/Qb   1 = Qa/Qb   Qa = (1/5) * 4 = 4/5= 
<gadget id="calculator">4/5</gadget>
<output>4/5 = around 0.8</output>
0.8 approx   Answer : 0.8
<result>B</result>
Mixture A is 20 percent oil, and mixture B is 60 percent oil. If the two are poured together to create a 4-gallon mixture that contains 40 percent oil, approximately how many gallons of mixture A are in the mixture?