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