Drum X is 1/2 full of oil and drum Y, which has twice the capacity of drum X, is 2/5 full of oil. If all of the oil in drum X is poured into drum Y, then drum Y will be filled to what capacity?
Answers:
A) 4/5  B) 8/15  C) 11/15  D) 9/20  E) 13/20
(1/2)X = (1/4)Y   (1/4)Y + (2/5)Y = (13/20)Y   The answer is 13/20.
<result>E</result>
Drum X is 1/2 full of oil and drum Y, which has twice the capacity of drum X, is 2/5 full of oil. If all of the oil in drum X is poured into drum Y, then drum Y will be filled to what capacity?