I DON't know. There's no way to know. You haven't given us any information at all about how much either one drank. Besides the part you copied, we need the rest of the question too. Your question is a lot like me asking "If one foot of height is equivalent to 12 inches of height, how many inches tall am I ?"
Hmm, presuming they each drink half a pint each (one cup) then one. But really, you can't know for certain. There are so many variables for this question that we cannot state a fair, correct answer. Maybe ask your teacher for more information?
