# Theoretical probability

**68**NRICH Mathematical resources connected to

**Theoretical probability**

article

### A probability conundrum

What do we mean by probability? This simple problem may challenge your ideas...

article

### What is a random variable, really?

This article offers an advanced perspective on random variables for the interested reader.

problem

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### Which spinners?

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

problem

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### Who's the winner?

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

problem

### Distribution Differences

How could you compare different situation where something random
happens ? What sort of things might be the same ? What might be
different ?

problem

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### 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?