Conditional probability

What percentage of students who graduate have never been to France?

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

How do different drug-testing regimes affect the risks and payoffs for an athlete who chooses to take drugs?

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

Use cunning to work out a strategy to win this game.

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?

Can you work out the probability of winning the Mathsland National Lottery?

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

Invent a set of three dice where each one is better than one of the others?

Explore these X-dice with numbers other than 1 to 6 on their faces. Which one is best?