1. The expression (10C5)(8C2)18C7represents the probability in a hypergeometric distribution. What are the values of r, a and n?
2. Consider a hypergeometric situation with N = 30, r = 6, and a = 10

a) Determine the probability distribution. (hint: make a table)

b) Show that the Expected Value is ra/N by comparing the sum of xP(X) to ra/N.

3. Which discrete probability distribution you would use to model the following situations and for each state your reasons.

a) Flipping a coin ten times and counting the heads

b) Drawing a card with replacement from a deck and looking for a 10

c) Choosing a co-ed team of 5 students from a class of 20 and counting the number of girls on the team