Exploring the Basics of Probability

What can probability be expressed as?

• Only as a percent

• Only as a decimal

• Only as a fraction

• Fraction, decimal, or percent

What does a probability of 1 indicate?

• The event is certain to happen

• The event has a 50% chance of happening

• The event is impossible

• The event is unlikely

What is the probability of an impossible event?

• 0.5

• 0

• 1

• 100%

What does a probability of 0 indicate?

• The event is likely

• The event is certain to happen

• The event is unlikely

• The event is impossible

If an event's probability is 0.75, how is it classified?

• Likely

• Unlikely

• Impossible

• Certain

What does a probability of 0.5 signify?

• The event is impossible

• The event is certain

• The event is unlikely

• The event is as likely as not

How is a probability less than 0.5 described?

• Unlikely

• Certain

• Likely

• Impossible

If an event is described as 'likely', what can be inferred about its probability?

• It is 1

• It is less than 0.5

• It is exactly 0.5

• It is more than 0.5 but less than 1

What is the formula for calculating probability?

• Total outcomes / Favorable outcomes

• Favorable outcomes / Unfavorable outcomes

• Unfavorable outcomes / Total possible outcomes

• Favorable outcomes / Total possible outcomes

What is the probability of rolling an odd number with a die?

• 1/3

• 1/2

• 1/6

• 2/3