Course Scheduling

If your college offers 400 courses, 25 of which are in mathematics, and your counselor arranges your schedule of 4 courses by random selection, how many schedules are possible that do not include a math course? Assume that the order in which courses are scheduled matters.

Question

Course Scheduling

If your college offers 400 courses, 25 of which  are in mathematics, and your counselor arranges your schedule of 4 courses by random selection, how many schedules are possible that do not include a math course?  Assume that the order in which courses are scheduled matters.

anonymous · Answer

that's the same if you said that you have 375 courses and how many ways are there to choose 4 of them, and if order matters, it's 375!/371! I think