Consider a class containing 30 students.
(a) You wish to select a simple random sample of 10 students. How many different samples are possible? You may assume that the order of selection is irrelevant.
(b) Of the 30 students in the class, 8 of them have green eyes. If you select a simple random sample of 10students, what is the probability that exactly 3 of them will have green eyes? Explain your reasoning.