Two quarts containing 2⁄3 water and 1⁄3 formula are mixed with three quarts containing 3⁄8 water and 5⁄8 formula. Approximately what percent of the combined five-quart mixture is water?
Select: A) 40% B) 45% C) 50% D) 55% E) 60%
Since we are asking of water in the end, lets concentrate on water only..   A solution has 2 quarts with fraction of water =2/3, almost 67%..   B solution has 3 quarts with fraction of water =3/8 almost 37%..   so the ratio A:B=2:3...   the average will therefore be closer to B % and will be 2/(2+3) of {67-37} away from B..   2/(2+3) of {67-37}= 2/5 * 30 =12..   so 37 +12= 
<gadget id="calculator">37 +12</gadget>
<output>49</output>
49 nearly 50%   ANSWER:50%
<result>C</result>
Two quarts containing 2⁄3 water and 1⁄3 formula are mixed with three quarts containing 3⁄8 water and 5⁄8 formula. Approximately what percent of the combined five-quart mixture is water?