There are **22** NRICH Mathematical resources connected to **Probability**, you may find related items under Probability.

This interactivity invites you to make conjectures and explore probabilities of outcomes related to two independent events.

If two of these unusually numbered dice are thrown, how many different sums are possible?

Can you design your own probability scale?

How do you describe the different parts?

What are the likelihoods of different events when you roll a dice?

A simple spinner that is equally likely to land on Red or Black. Useful if tossing a coin, dropping it, and rummaging about on the floor have lost their appeal. Needs a modern browser; if IE then at. . . .

Alison and Charlie are playing a game. Charlie wants to go first so Alison lets him. Was that such a good idea?

Fancy a game of cricket? Here is a mathematical version you can play indoors without breaking any windows.

Uncertain about the likelihood of unexpected events? You are not alone!

The beginnings of understanding probability begin much earlier than you might think...

This article explains how tree diagrams are constructed and helps you to understand how they can be used to calculate probabilities.

Some people offer advice on how to win at games of chance, or how to influence probability in your favour. Can you decide whether advice is good or not?

In the time before the mathematical idea of randomness was discovered, people thought that everything that happened was part of the will of supernatural beings. So have things changed?

Which of these ideas about randomness are actually correct?

Can you generate a set of random results? Can you fool the random simulator?

These red, yellow and blue spinners were each spun 45 times in total. Can you work out which numbers are on each spinner?

Think that a coin toss is 50-50 heads or tails? Read on to appreciate the ever-changing and random nature of the world in which we live.

This article, written by Nicky Goulder and Samantha Lodge, reveals how maths and marimbas can go hand-in-hand! Why not try out some of the musical maths activities in your own classroom?

Here are some examples of 'cons', and see if you can figure out where the trick is.

Can you beat Piggy in this simple dice game? Can you figure out Piggy's strategy, and is there a better one?

All you need for this game is a pack of cards. While you play the game, think about strategies that will increase your chances of winning.

In a race the odds are: 2 to 1 against the rhinoceros winning and 3 to 2 against the hippopotamus winning. What are the odds against the elephant winning if the race is fair?

Is a score of 9 more likely than a score of 10 when you roll three dice?