Lesson 7-1 Probability Vocabulary

Equally Likely as Unlikely

• 25% chance

• 50% chance

• 75% chance

• 100% chance

Certain

• 50% chance (it might happen)

• 100% chance (it will definitely happen)

• 75% chance (it is likely to happen)

• 0% chance (it will not happen)

Likely

• 0-25% chance

• 26-50% chance

• 51-99% chance

• 100% chance

Outcomes

• Results

• Causes

• Processes

• Methods

Impossible

• 0% chance (it definitely will not happen)

• 50% chance (it might happen)

• 100% chance (it will definitely happen)

• 25% chance (it is unlikely to happen)

Fair

• There is an equal chance of each outcome

• One outcome is more likely than others

• Outcomes are predetermined

• All outcomes are impossible

Likelihood

• Probability

• Chance

• Possibility

• Certainty

Unfair

• There is not an equal chance of each outcome.

• All outcomes have the same probability.

• Outcomes are determined by chance alone.

• Every outcome is equally likely to occur.

Probability

• The likelihood an event will happen

• The certainty that an event will not happen

• The chance of an event occurring at least once

• The measure of how often an event has occurred in the past

Unlikely

• 1-49% chance

• 50-69% chance

• 70-89% chance

• 0-20% chance