A certain quantity of 40% concentration solution is replaced with 20% 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? Select the correct option: A) 1:3 B) 1:2 C) 2:3 D) 2:1 E) 3:1
20% - - - - - - - - - 35% - - - - - - 40%   From 20 to 35 =15   From 35 to 40 = 5   So the ratio is  15/5= 
<gadget id="calculator"> 15/5</gadget>
<output>3</output>
3 to 1   1:3 it is
<result>A</result>
A certain quantity of 40% concentration solution is replaced with 20% 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?