Did Well on Midterm

Did Poorly on Midterm

Studying for Exam

80

20

Went Bar Hopping

30

70

1.Referring to Table 4-2, what is the probability that a randomly selected student who went bar hopping did well on the midterm?Hint: Marginal Probability

2.Referring to Table 4-2, what is the probability that a randomly selected student did well on the midterm or went bar hopping the weekend before the midterm?Hint: General Addition Rule/Law

3.A credit union has two branches; each branch has two departments, and each department has four employees. How many total people does the credit union employ? If you work for the credit union, and one employee is randomly selected to go to a convention, what is the probability that you will be chosen?Hint: You may want to create a tree diagram.

4.A company employs eight people and plans to select a group of three of these employees to receive advanced training. How many ways can the group of three employees be selected?Hint: Counting rule.