# Tree diagrams

**24**NRICH Mathematical resources connected to

**Tree diagrams**

problem

### Do you brush your teeth every day?

How can we find out answers to questions like this if people often lie?

project

### Investigating Epidemics

Simple models which help us to investigate how epidemics grow and die out.

problem

Favourite

### Which spinners?

Can you work out which spinners were used to generate the frequency charts?

problem

Favourite

### Who's the winner?

When two closely matched teams play each other, what is the most likely result?

problem

Favourite

### Non-Transitive Dice

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

problem

Favourite

### At least one...

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?