# Probability - Stage 4

### In a Box

##### Stage: 4 Challenge Level:

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?

### Chances Are

##### Stage: 4 Challenge Level:

Which of these games would you play to give yourself the best possible chance of winning a prize?

### The Better Bet

##### Stage: 4 Challenge Level:

Here are two games you have to pay to play. Which is the better bet?

### Which Spinners?

##### Stage: 4 Challenge Level:

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

### Last One Standing

##### Stage: 4 Challenge Level:

Imagine a room full of people who keep flipping coins until they get a tail. Will anyone get six heads in a row?

### Same Number!

##### Stage: 4 Challenge Level:

If everyone in your class picked a number from 1 to 225, do you think any two people would pick the same number?

### Mathsland National Lottery

##### Stage: 4 Challenge Level:

Can you work out the probability of winning the Mathsland National Lottery? Try our simulator to test out your ideas.

### Who's the Winner?

##### Stage: 4 Challenge Level:

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

### Probability Stage 4 - Short Problems

##### Stage: 4

A collection of short Stage 4 problems on probability.

### Odds and Evens Made Fair

##### Stage: 4 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.

### Swapping Sweets

##### Stage: 4 Short Challenge Level:

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?

### XOXOXO

##### Stage: 4 Short Challenge Level:

6 tiles are placed in a row. What is the probability that no two adjacent tiles have the same letter on them?

### Domino Match

##### Stage: 4 Short Challenge Level:

If you take two dominoes from a set at random, what is the probability that they 'match'?

### CD Collection

##### Stage: 4 Short Challenge Level:

How many different ways can I arrange the CDs in my collection?

### Flipping Coins

##### Stage: 4 Short Challenge Level:

A coin is flipped 4 times. What is the probability of getting heads at least 3 times?