Exploring the Basics of Probability

What is the probability of an impossible event?

• 0

• 3/4

• 1

• 1/2

If an event is certain to happen, what is its probability?

• 1/4

• 1/2

• 1

• 3/4

How do you calculate the probability of an event?

• Total outcomes / Successful outcomes

• Successful outcomes / Total outcomes

• Unsuccessful outcomes / Total outcomes

• Successful outcomes - Total outcomes

What does the complement of an event represent?

• The likelihood of the event not happening

• The number of successful outcomes

• The likelihood of the event happening

• The total number of outcomes

What is the probability of rolling a six on a dice?

• 1/6

• 2/3

• 1/2

• 1/3

What is the simplified probability of picking a black sock from a laundry of 24 socks, where 10 are black?

• 1/4

• 1/2

• 5/12

• 1/3

What is the probability of not spinning a six on a spinner with seven outcomes?

• 5/7

• 1/2

• 6/7

• 1/7

In a box of 30 crayons, if 16 are red, what is the simplified probability of picking a red crayon?

• 8/15

• 1/2

• 3/5

• 2/5

If there are 15 movies and 7 are action movies, what is the probability of randomly selecting an action movie?

• 7/15

• 1/2

• 2/3

• 1/3

What is the probability of a student preferring fajitas over spaghetti if 16 chose fajitas and 8 chose spaghetti?

• Half as likely

• Twice as likely

• 2/3

• 1/3