# Draw a tree diagram for dependent events

In this lesson, we will learn how to draw tree diagrams and complete missing probabilities in tree diagrams for dependent events.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.For the probability tree shown, which calculation will find the probability of red followed by blue happening?

1/3

Q2.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.

2/3

Q3.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?

3/3

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.For the probability tree shown, which calculation will find the probability of red followed by blue happening?

1/3

Q2.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.

2/3

Q3.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?

3/3

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Draw a tree diagram for dependent events

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Probability of a dependent event is also called?

1/3

Q2.Simon has drawn this probability tree for a question on dependent probability. What mistake has he made?

2/3

Q3.This tree diagram shows Amir taking red and blue sweets from a bag. He does not replace the sweet after he has taken one.

3/3

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# Draw a tree diagram for dependent events

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Probability of a dependent event is also called?

1/3

Q2.Simon has drawn this probability tree for a question on dependent probability. What mistake has he made?

2/3

Q3.This tree diagram shows Amir taking red and blue sweets from a bag. He does not replace the sweet after he has taken one.

3/3

# Lesson summary: Draw a tree diagram for dependent events

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Climb stairs

On the spot:
Dance