One fourth of a solution that was 12% sugar by weight was replaced by a second solution resulting in a solution that was 16 percent sugar by weight. The second solution was what percent sugar by weight?  Pick one
A) 34 %	B) 28 %	C) 22 %	D) 18 %	E) 8.5 %

Rationale: "instead of using complex calculations and remembering formulae , why dont u directly get to weighted average . 3 parts of 12 % + 1 part of x ( unknown ) % = 4 parts of 16 % = > x % = 64 % - 36 % = 28 % ans b it is ."
Answer: B