how many ounces of a 12 alcohol solution that must be mixed with 7 ounces of a 20% alcohol solution to make a 16%

Answer 1

7 ounces

16 is midway between 12 and 20, so the same amount of 12 and 20 is needed to get 16% solution

.12(7) + .20(7) = .84 + 1.4 = 2.24

= (7+7)(.16) = 14(.16) = 2.24