Draw a tree diagram for dependent events

Maths

Probability 3 (Tree diagrams)

Probability of a dependent event is also called?

The fractions on each branch do not sum to 1.

The second part of the probability tree has incorrect probabilities.

Simon has drawn this probability tree for a question on dependent probability. What mistake has he made?

This tree diagram shows Amir taking red and blue sweets from a bag. He does not replace the sweet after he has taken one.

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?

Draw a tree diagram for dependent events

Lesson outcome