Probability

problem
Very old man

Age

16 to 18

Challenge level

Is the age of this very old man statistically believable?
problem
It's a tie

Age

7 to 11

Challenge level

Kaia is sure that her father has worn a particular tie twice a week in at least five of the last ten weeks, but her father disagrees. Who do you think is right?
problem
Taking chances

Age

11 to 14

Challenge level

This article, for students and teachers, is mainly about probability, the mathematical way of looking at random chance and is a shorter version of Taking Chances Extended.
problem
Bet you a million

Age

14 to 16

Challenge level

Heads or Tails - the prize doubles until you win it. How much would you pay to play?
problem
The birthday bet

Age

14 to 16

Challenge level

The next ten people coming into a store will be asked their birthday. If the prize is £20, would you bet £1 that two of these ten people will have the same birthday ?
problem
The better choice

Age

14 to 16

Challenge level

Here are two games you can play. Which offers the better chance of winning?
problem
Cosy corner

Age

11 to 14

Challenge level

Six balls are shaken. You win if at least one red ball ends in a corner. What is the probability of winning?
problem
Two's company

Age

11 to 14

Challenge level

Seven balls are shaken. You win if the two blue balls end up touching. What is the probability of winning?
problem
Domino pick

Age

5 to 7

Challenge level

Are these domino games fair? Can you explain why or why not?
problem
Odds and evens

Age

11 to 14

Challenge level

Are these games fair? How can you tell?