An instructor who taught two sections of engineering statistics last term, the first with the 20 students and second with 30, decided to assign the term project. After all projects had been turned in, the instructor randomly ordered them before grading. Suggest the first 15 graded projects.
(a) Determine the probability that exactly 10 of these are from the second section?
(b) Determine the probability that at least 10 of these are from the second section?