A certain quantity of 55% concentration solution is replaced with 25% concentration solution such that the concentration of the combined amount is 35%.
What's the ratio of the amount of solution that was replaced to the amount of solution that was not replaced? Answers.
A) 1:3 B) 1:2 C) 2:3 D) 2:1 E) 3:1
25% - - - - - - - - - 35% - - - - - - 55%   From 25 to 35 =10   From 35 to 55 = 20   So the ratio is 10/20 = 1 to 2   2:1 it is
<result>D</result>
A certain quantity of 55% concentration solution is replaced with 25% concentration solution such that the concentration of the combined amount is 35%.
What's the ratio of the amount of solution that was replaced to the amount of solution that was not replaced?