Bitesize has changed! We're updating subjects as fast as we can. Visit our new site to find Bitesize guides and clips - and tell us what you think!

Home > Maths > Handling data > Probability




The probability scale

Describing probabilities

We often make judgments as to whether an event will take place, and use words to describe how probable that event is. For example, we might say that it is likely that the sun will come up tomorrow, or that it is impossible to find somebody who is more than 3m tall.

The probability scale

Maths uses numbers to describe probabilities. Probabilities can be written as fractions, decimals or percentages. You can also use a probability scale, starting at 0 (impossible) and ending at 1 (certain).

Here are some events placed on the probability scale.

Probability scale

Now try to order the probabilities in the activity below.

In order to see this content you need to have both Javascript enabled and Flash installed.


Probability activity

What are the chances of you trying this activity?


Gut Instinct

Can you match Viral Vinnie's appetite for English, Maths and Science?

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.