Understanding Probability Concepts

The video tutorial revises key probability terminology and explains the probability line, which shows the likelihood of events occurring. It covers common terms like impossible, unlikely, even chance, likely, and certain, as well as alternative terms such as improbable and probable. The tutorial also demonstrates how to use fractions, percentages, and decimals to express probability, with examples of events and their associated probabilities.

What is the purpose of the probability line?

• To calculate the time taken for an event

• To measure the speed of an event

• To show the likelihood of different events occurring

• To determine the cost of an event

How do probabilities relate to each other on the probability line?

• They measure the duration of events

• They are unrelated

• They show a sequence of events

• They indicate the likelihood of events from least to most likely

Which of the following is NOT a common term used in probability?

• Expensive

• Certain

• Unlikely

• Impossible

What term describes an event that is equally likely to happen or not happen?

• Impossible

• Even chance

• Certain

• Unlikely

Which term describes an event that will never happen?

• Even chance

• Likely

• Impossible

• Certain

Which term can be used to describe a 50% probability?

• Never

• Always

• Improbable

• 50/50

What is the probability of an event that is described as 'improbable'?

• 1

• 0.5

• 0.25

• 0

What is the probability of an event that is described as 'always'?

• 0.25

• 0

• 0.5

• 1

How can probability be expressed numerically?

• Using shapes

• Using letters

• Using fractions, percentages, and decimals

• Using colors

What is the probability of an impossible event?

• 100%

• 0

• 1

• 0.5