25 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 5:4?  Choose the most appropriate option.
A) 1 B) 2 C) 3 D) 4 E) 5
Let x be the amount of liquid Q to be added.   (2/5)*25 + x = (4/9)*(25+x)   450 + 45x = 500 + 20x   25x = 50   x = 2   The answer is 2.
<result>B</result>
25 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 5:4?