A mixture of 200 liters of wine and water contains 20% water. How much more water should be added so that water becomes 25% of the new mixture? Pick one:
A) 11 liters  B) 11.2 liters  C) 12.5 liters  D) 13.78 liters  E) 13.33 liters

Rationale: "number of liters of water in 200 liters of the mixture = 20 % of 120 = 20 / 100 * 200 = 40 liters . p liters of water added to the mixture to make water 25 % of the new mixture . total amount of water becomes ( 40 + p ) and total volume of mixture is ( 200 + p ) . ( 40 + p ) = 25 / 100 * ( 200 + p ) 160 + 4 p = 200 + p p = 13.33 liters . answer : e"
Answer: E