TABLE 4 2 An alcohol awareness task force at a Big Ten university sampled 200 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm The following result was obtained Did Well on Midterm Did Poorly on Midterm Studying for Exam 60 30 Went Bar Hopping 40 70 Referring to Table 4 2, what is the probability that a randomly selected student who went bar hopping did well on the midterm Hint Conditional Probability Marginal Probability 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 A credit union has three 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 A company employs ten 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

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TABLE 4-2 An alcohol awareness task force at a Big-Ten university sampled 200 students after the midterm to ask them whether they went bar hopping

TABLE 4-2

An alcohol awareness task force at a Big-Ten university sampled 200 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying, and whether they did well or poorly on the midterm. The following result was obtained.

	Did Well on Midterm	Did Poorly on Midterm
Studying for Exam	60	30
Went Bar Hopping	40	70

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

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

A credit union has three 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.

A company employs ten 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.