Probability
problem
Nine or Ten?
Age
11 to 14
Challenge level
Is a score of 9 more likely than a score of 10 when you roll three dice?
problem
Dropouts
Age
14 to 16
Challenge level
What percentage of students who graduate have never been to France?
problem
Strange dice
Age
11 to 14
Challenge level
If two of these unusually numbered dice are thrown, how many different sums are possible?
article
A probability conundrum
What do we mean by probability? This simple problem may challenge your ideas...
problem
Do you brush your teeth every day?
Age
14 to 18
Challenge level
How can we find out answers to questions like this if people often lie?
article
What is a random variable, really?
This article offers an advanced perspective on random variables for the interested reader.
problem
Odds and Evens made fair
Age
14 to 16
Challenge level
In this follow-up to the problem Odds and Evens, we invite you to analyse a probability situation in order to find the general solution for a fair game.
project
Investigating Epidemics
Simple models which help us to investigate how epidemics grow and die out.
interactivity
Red or Black Spinner
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 least version 9.