You will need a 0-9 spinner like the one in the picture or […]
This is a game for the whole class. It can be played a few times as a lesson starter. The teacher will need a 0 to 9 spinner or dice.
For scissors hold out 2 fingers like a pair of scissors.
For paper hold your hand out flat.
For rock clench your hand into a fist.
Count 1 , 2, 3 and then both players make one of the signs scissors, or paper or rock at the same […]
Suppose you throw a double one. On the next throw, is your chance of throwing a double one the same, more likely or less […]
Next suppose I pick 2 of the 6 cards at […]
Twenty per cent of the inhabitants of a city have been inoculated against a certain disease. An epidemic hits the city and the chance of infection amongst those inoculated is 10% but amongst the rest it is 75%.
Copy and fill in the contingency table and the Venn diagram below and use them to answer […]
Mzo picks one marble from each bag at random.
What is the probability he picks one of each colour? What is the probability he does NOT pick a […]
Eight of the envelopes each contain 5 blue and 3 red sheets of paper.
The other 12 envelopes each contain 6 blue and 2 red sheets of paper.
You choose one envelope at random. Then you choose a sheet of paper from it at […]
This game uses ten cards numbered 0, 1, … 9. The cards are put face down and mixed up. The aim of the game is to make a number as close to half a million as possible.
Each player has six boxes […]
If Busi has 3 children what is the probability that at least one will be a girl?
Imagine tossing a coin three times.
What’s the probability you will get a head on at least one of the tosses?
Suppose you drew this tree diagram. How would it help you to find the answers to […]