# The freshman class has 160 students. Each freshman must write three reports from a list of 12 novels that the teacher has assigned them to read. How many different combinations of novels can a freshman student choose to write reports on?

each student can write $12$ choose $3$ possible combination of reports which is (n!)/((n-k)!k!) = 220 . It seems a bit necessary to mention the class size but perhaps that was to test your knowledge.