If 10 ounces of a strong vinegar solution are diluted with 50 ounces of water to form a five-percent vinegar solution, what was the concentration of the original solution? Select:  A) 25%  B) 28%  C) 30%  D) 32%  E) 36%
Let x be the concentration of the original solution.   10x = 0.05(60)   x = 0.3   The answer is 30%.
<result>C</result>
If 10 ounces of a strong vinegar solution are diluted with 50 ounces of water to form a five-percent vinegar solution, what was the concentration of the original solution?