Cream costs twice as much as skim milk. A certain brand of milk is 3/5 cream and 2/5 skim milk. What fraction of the cost of this brand is due to the cream? Select
A) 1/2 B) 1/3 C) 2/3 D) 3/4 E) 4/5
Let x be the cost of the skim milk in the mixture.   The cost of the cream is (3/2)*x*2 = 3x.   The total cost is x+3x = 4x and the fraction due to the cream is 3x / 4x = 3/4   The answer is 3/4.
<result>D</result>
Cream costs twice as much as skim milk. A certain brand of milk is 3/5 cream and 2/5 skim milk. What fraction of the cost of this brand is due to the cream?