This set of resources for teachers offers interactive environments
to support probability work at Key Stage 4.
Which of these ideas about randomness are actually correct?
The King showed the Princess a map of the maze and the Princess was
allowed to decide which room she would wait in. She was not allowed
to send a copy to her lover who would have to guess which path. . . .
Can you work out which spinners were used to generate the frequency charts?
Can you generate a set of random results? Can you fool the random
You and I play a game involving successive throws of a fair coin.
Suppose I pick HH and you pick TH. The coin is thrown repeatedly
until we see either two heads in a row (I win) or a tail followed
by. . . .
Six balls of various colours are randomly shaken into a trianglular
arrangement. What is the probability of having at least one red in
Identical discs are flipped in the air. You win if all of the faces
show the same colour. Can you calculate the probability of winning
with n discs?
Four cards are shuffled and placed into two piles of two. Starting with the first pile of cards - turn a card over...
You win if all your cards end up in the trays before you run out of cards in. . . .
7 balls are shaken in a container. You win if the two blue balls
touch. What is the probability of winning?
Your partner chooses two beads and places them side by side behind a screen. What is the minimum number of guesses you would need to be sure of guessing the two beads and their positions?
In this game the winner is the first to complete a row of three.
Are some squares easier to land on than others?