Currently viewing the tag: "Probability"
The probability that there are two people in a group with birthdays in the same month depends on the size of the group.
What if the group has more than twelve people?
What about a group of 2 people? What is the probability they have birthdays in different months?
Both 9 and 10 can be made up in 2 different ways by adding pairs of the numbers 1, 2, … 6, that is
9 = 3 + 6 = 4 + 5
10 = 4 + 6 = 5 + 5
Explain why it is that when you throw two dice you are more […]
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 […]
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 […]
We have six cards, four Aces and the Jack of hearts and Queen of spades in an envelope or bag. You pick 2 cards at random and tell me “I have an Ace”. What is the probability that you have two aces?
Next suppose I pick 2 of the 6 cards at […]
GAMES FOR A GROUP OR CLASS OF ANY SIZE
See the Home Learning Guide to find the best game for your group. All the games are played in a similar way but with variations of scoring systems.
You will need a 0 to 9 spinner or ten cards. See instructions for […]
PLAY FOR FUN – THINK AND WIN – PLAY AND LEARN
This game helps you to understand place value. You want to win so THINK MATHEMATICALLY! The number must be big so put a big digit in the thousands place.
The game can easily be adapted to 2-digit or 3-digit numbers or […]
Najwa and Zuki play a game.
They put two red and four blue ribbons in a box. They pull out two ribbons at the same time without looking at the colours.
Najwa wins if both ribbons are the same colour.
Zuki wins if the two ribbons are different colours.
You could play the […]
Mathematical modelling and making real life connections is the focus of this guide. The use of tree diagrams in probability is developed starting with collecting data to model the numbers of boys and girls in families and the orders in which they occur. The connections between the underlying mathematics in these situatons, […]
You have 2 different bags of marbles.
One bag has 3 Red and 2 Blue the other has 5 Red and 3 Blue.
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 […]
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