Solution A is 20% salt and Solution B is 80% salt. If you have 30 ounces of solution A and 60 ounces of solution B, in what ratio could you mix Solution A with Solution B to produce 50 ounces of a 50% salt solution?
Choose the correct choice from the following:	A) 6 : 4	B) 6 : 14	C) 4 : 4	D) 4 : 6	E) 3 : 7

Rationale: "let : x = ounces taken from solution a ( 20 % salt ) y = ounces taken from solution b ( 80 % salt ) to prepare 50 ounce 50 % salt . first equation is simple : x + y = 50 to get another equation so as to be able to solve , compute salt contents . 20 % of x + 80 % of y = 50 % of 50 or x / 5 + 4 / 5 * y = 25 or x + 4 y = 125 solve two equations to get : x = 25 y = 25 so solutions has to mix in 1 : 1 oops 4 : 4 answer : c"
Answer: C