Calculate probabilities of independent events

Maths

Probability 3 (Tree diagrams)

For the probability tree shown, which calculation will find the probability of red followed by blue happening?

The probability that Amy and Joe win a game of chess is shown in the tree diagram. Work out the probability that over 2 games Amy wins twice.

All probabilities add to 1 on each branch.

It doesn’t matter if he eats the first sweet he takes.

James draws this probability tree diagram to help him calculate probabilities of taking sweets from a bag. What assumptions has James made when completing this probability tree?

Here is the first branch of a probability tree diagram.

Here is the first branch of a different probability tree diagram. What should the missing probability be?

This tree diagram shows Amir taking red and blue counters from a jar. He replaces the counter after he has picked one up.

This lesson will be removed by end of Summer Term 2025.

Calculate probabilities of independent events

Lesson outcome

This lesson will be removed by end of Summer Term 2025.