There are **27** NRICH Mathematical resources connected to **Theoretical probability**, you may find related items under Probability.

What statements can you make about the car that passes the school gates at 11am on Monday? How will you come up with statements and test your ideas?

What can you say about the child who will be first on the playground tomorrow morning at breaktime in your school?

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

Kaia is sure that her father has worn a particular tie twice a week in at least five of the last ten weeks, but her father disagrees. Who do you think is right?

Six balls are shaken. You win if at least one red ball ends in a corner. What is the probability of winning?

Seven balls are shaken. You win if the two blue balls end up touching. What is the probability of winning?

Discs are flipped in the air. You win if all the faces show the same colour. What is the probability of winning?

Have a go at this game which involves throwing two dice and adding their totals. Where should you place your counters to be more likely to win?

Anna and Becky put one purple cube and two yellow cubes into a bag to play a game. Is the game fair? Explain your answer.

Roll two red dice and a green dice. Add the two numbers on the red dice and take away the number on the green. What are all the different possible answers?

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?

Imagine flipping a coin a number of times. Can you work out the probability you will get a head on at least one of the flips?

Engage in a little mathematical detective work to see if you can spot the fakes.

You'll need to work in a group for this problem. The idea is to decide, as a group, whether you agree or disagree with each statement.

Find out about the lottery that is played in a far-away land. What is the chance of winning?

Which of these ideas about randomness are actually correct?

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

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, for students and teachers, is mainly about probability, the mathematical way of looking at random chance and is a shorter version of Taking Chances Extended.

In this game you throw two dice and find their total, then move the appropriate counter to the right. Which counter reaches the purple box first?

A maths-based Football World Cup simulation for teachers and students to use.

When you throw two regular, six-faced dice you have more chance of getting one particular result than any other. What result would that be? Why is this?

Mrs. Smith had emptied packets of chocolate-covered mice, plastic frogs and gummi-worms into a cauldron for treats. What treat is Trixie most likely to pick out?

Bipin is in a game show and he has picked a red ball out of 10 balls. He wins a large sum of money, but can you use the information to decided what he should do next?

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