Probability Warm Up

If Eduardo flipped a coin three times, his sample space of results would contain how many variations. Remember that order matters.

• 4

• 8

• 12

• 14

Probability is ...

• the chance that some event will occur.

• a game that involves coins.

• a guarantee.

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

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.

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

• 8/20

• 12/20

• 8/44

• 12/56

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:

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

• 1/100

• 2/100

• 1/33

• 1/67

What is the probability that a randomly selected employee is male and a sergeant?

• 8/13

• 8/33

• 8/67

• 8/100

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

Given the employee is an inspector, what is the probability the employee is male?

• 2/6

• 2/33

• 2/67

• 2/100

What is the probability of rolling 15 with a pair of dice?

• impossible

• unlikely

• equally likely

• likely

What is the probability of spinning a blue or red?

• unlikely

• equally likely

• likely

• certain