A certain drink of type A is prepared by mixing 4 parts milk with 3 parts fruit juice. Another drink of type B is prepared by mixing 4 parts of fruit juice and 3 parts of milk. How many liters of fruit juice must be added to 84 liters of drink A to convert it to drink B?
Choose the correct answer
A) 24 B) 28 C) 32 D) 36 E) 40
In 84 liters of drink A, there are 48 liters of milk and 36 liters of juice.   With 48 liters of milk, we need a total of 64 liters of juice to make drink B.   We need to add 28 liters of juice.   The answer is 28.
<result>B</result>
A certain drink of type A is prepared by mixing 4 parts milk with 3 parts fruit juice. Another drink of type B is prepared by mixing 4 parts of fruit juice and 3 parts of milk. How many liters of fruit juice must be added to 84 liters of drink A to convert it to drink B?