20 liters of a mixture is created by mixing Liquid P and Liquid Q in the ratio 3:2. How many liters of Liquid Q must be added to make the ratio 4:3?	Choose one.
A) 1
B) 3
C) 5
D) 7
E) 9
Let x be the amount of liquid Q to be added.   (2/5)*20 + x = (3/7)*(20+x)   280 + 35x = 300 + 15x   20x = 20   x = 1   The answer is 1.
<result>A</result>
20 liters of a mixture is created by mixing Liquid P and Liquid Q in the ratio 3:2. How many liters of Liquid Q must be added to make the ratio 4:3?