Introduction to Probability Quiz

What does probability help us understand?

• The reason behind an event

• The exact outcome of an event

• The likelihood of an event occurring

• The time an event will occur

Which of the following is NOT a component of the probability formula?

• Favorable outcomes

• Total possible outcomes

• Event certainty

• Probability of an event

In the spinner example, what is the probability of landing on a three as a fraction?

• 1/5

• 1/2

• 1/3

• 1/4

How is the probability of landing on a three expressed as a percentage?

• 50%

• 75%

• 25%

• 10%

What is the decimal representation of the probability of landing on a three?

• 0.10

• 0.30

• 0.20

• 0.25

In the marble example, how many red marbles are there?

• 8

• 7

• 6

• 5

What is the probability of picking a red marble as a fraction?

• 9/10

• 5/10

• 3/10

• 7/10

How is the probability of picking a red marble expressed as a decimal?

• 0.5

• 0.6

• 0.8

• 0.7

What is the percentage chance of picking a red marble?

• 80%

• 70%

• 60%

• 50%

What term is used to describe an event with a probability greater than 50%?

• Unlikely event

• Impossible event

• Certain event

• Likely event