In what ratio P:Q should the Mixture P of milk and water in the ratio of 5:4 be mixed with another Mixture Q of milk and water in the ratio 2:7 so that the resultant mixture contains equal quantities of milk and water?  Pick one.
A) 3:2  B) 2:1  C) 4:3  D) 4:1  E) 5:1
(5/9)*P +(2/9)*Q = (4/9)*P+(7/9)*Q   P=5Q   P/Q = 5/1   The answer is 5:1.
<result>E</result>
In what ratio P:Q should the Mixture P of milk and water in the ratio of 5:4 be mixed with another Mixture Q of milk and water in the ratio 2:7 so that the resultant mixture contains equal quantities of milk and water?