Lesson

What words can you think of that describe the the chance of something happening? Can you think of examples of events that fit each word you can think of?

What is the chance my paper plane will fly forever?

A

Impossible

B

In between certain and impossible

C

Certain

Worked Solution

Idea summary

Impossible means that an event cannot happen.

Certain means that an event will definitely happen.

This video shows us how to describe the likelihood of events.

What is the chance of flipping tails with a coin?

A

Unlikely

B

Likely

C

Even chance

Worked Solution

Idea summary

If an event has an even chance of happening, then it is likely to happen half the time.

How likely something is can be visualised on a line similar to a number line. This video shows us how.

The events A, B, C and D have probabilities as shown on this probability line:

a

Which events are more likely to occur than event B?

A

Events A and C

B

Events C and D

C

Events A and D

Worked Solution

b

Which events are less likely to occur than event C?

A

Events A and B

B

Events B and D

C

Events A and D

Worked Solution

Idea summary

In order of how much chance something has of happening, we can start from the left, and move right. It's just like a number line.