The title states the full question I was provided with. Am I able to just assume the class contains more than 12 students? If so, would we just do:
(n choose 2?); where n = number of students in class?
If not, how else could I go about this? Do I need to break it into more than 1 case? I know the solution is probably very simple, I just don't know if I am thinking about this in the right manner.