I don't believe there is a quota per school. Don't worry.
Sorry didn't answer back about the roles i chose. I was in class and the teacher hates us being on our phones. I figured that the more roles i chose the better the chances of at least getting something. I chose attractions, merchandise, main entrance operations, and quick food and beverage service. I still have the opportunity to add roles if i email support before my phone interview Tuesday. If any further suggestions on role selection, let me know. :-D