A portion of the 95% solution of dye was replaced with an equal amount of 20% solution of dye. As a result, 40% solution of dye resulted. What part of the original dye was replaced?	Choose the correct choice from the following answers
A) 2/5	B) 3/7	C) 5/17	D) 11/15	E) 10/11
This is a weighted average question. Say x% of the dye was replaced --&gt; equate the amount of dye in the solution: 0.95(1-x)+0.2*x=0.4 --&gt; x=11/15.   Answer: 11/15.
<result>D</result>
A portion of the 95% solution of dye was replaced with an equal amount of 20% solution of dye. As a result, 40% solution of dye resulted. What part of the original dye was replaced?