Question 17
How many grams of pure gold must be added to five grams of a mixture that consists of 10% gold and 90% of some other metal so that the mixture will contain 20% gold?
(A) 0.125 (B) 0.25 (C) 0.375 (D) 0.5 (E) 0.625
(A) 0.125 (B) 0.25 (C) 0.375 (D) 0.5 (E) 0.625