Chris and Jo put two red and four blue ribbons in a box. They each pick a ribbon from the box without looking. Jo wins if the two ribbons are the same colour. Is the game fair?
Which of these games would you play to give yourself the best possible chance of winning a prize?
Here are two games you have to pay to play. Which is the better bet?
Can you work out which spinners were used to generate the frequency charts?
Imagine a room full of people who keep flipping coins until they get a tail. Will anyone get six heads in a row?
If everyone in your class picked a number from 1 to 225, do you
think any two people would pick the same number?
Can you work out the probability of winning the Mathsland National Lottery? Try our simulator to test out your ideas.
When two closely matched teams play each other, what is the most likely result?
A collection of short Stage 4 problems on probability.
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.
If two girls each take a sweet from each other's bags, what is the probability that they end up with what they started with?
6 tiles are placed in a row. What is the probability that no two adjacent tiles have the same letter on them?
If you take two dominoes from a set at random, what is the probability that they 'match'?
How many different ways can I arrange the CDs in my collection?
A coin is flipped 4 times. What is the probability of getting heads at least 3 times?