Two Way Tables

How many chemical engineers chose Science as their favorite subject?

• 80
• 91
• 171
• 262

What percentage of the students were boys?

• 20%
• 25%
• 40%
• 50%

Out of those surveyed, what is the probability that the student is a boy who can't bike to school (in simplest form)?

• 4/30
• 7/30
• 2/15
• 14/30

The two-way table above gives information about the grades for the semester in Mrs. Hardcase’s English class.

1) What is the probability a randomly selected student got an A or B for the semester?

• 15/100

• 20/100

• 35/100

• 65/100

The two-way table above gives information about the grades for the semester in Mrs. Hardcase’s English class.

2) What is the probability a randomly selected student is male?

• 12/100

• 17/100

• 44/100

• 56/100

The two-way table above gives information about the grades for the semester in Mrs. Hardcase’s English class.

3) What is the probability a randomly selected student earned a passing grade?

• 20/100

• 35/100

• 65/100

• 87/100

The two-way table above gives information about the grades for the semester in Mrs. Hardcase’s English class.

4) Given that the grade is an A, what is the probability of the student being female?

• 8/20

• 12/20

• 8/44

• 12/56

The two-way table above gives information about the grades for the semester in Mrs. Hardcase’s English class.

5) Given that the grade is a B, what is the probability of the student being male?

• 6/15

• 9/15

• 6/56

• 9/44

The make-up of employees at a police station is shown in the table above:

6) What is the probability that a randomly selected employee is a chief?

• 1/100

• 2/100

• 1/33

• 1/67

The make-up of employees at a police station is shown in the table above:

8) Given the employee is a chief, what is the probability the employee is male?

• 1/100

• 1/33

• 1/2

• 1/67