sandy wrote:
Jane has a 40-ounce mixture of apple juice and seltzer that is 30% apple juice. If she pours 10 more ounces of apple juice into the mixture, what percent of the mixture will be seltzer?
(A) 33%
(B) 44%
(C) 50%
(D) 56%
(E) 67%
Given 40 ounce mix = Apple juice + seltzer
Now 40 ounces contain 30% apple juice i.e. 12 ounce and seltzer will be 28 ounces.
We are told that 10 more ounces of apple juice ( 100% ) is added to mixture, then total mixture will be 50 ounces.
We want seltzer percentage in the total juice and since only 100% apple juice is added, seltzer concentration doesn't get affected.
So. 28 / 50 => 0.56
D.