How many ounces of a 60% salt solution must be added to 60 ounces of a 20 percent salt solution so that the resulting mixture is 40% salt?	Choose the correct choice
A) 16.67  B) 30  C) 50  D) 60  E) 70
let x=ounces of 60% salt solution to be added   .2*60+.6x=.4(60+x)   x=60   Answer 60
<result>D</result>
How many ounces of a 60% salt solution must be added to 60 ounces of a 20 percent salt solution so that the resulting mixture is 40% salt?