# Combined events and tree diagrams (Part 2)

In this lesson, we will look at examples of when a tree diagram is more useful for combined events than a sample space diagram.

#### 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.What is the probability that I win both games?

1/5

Q2.What is the probability that I win at least one game?

2/5

Q3.What is the probability that I win exactly one game?

3/5

Q4.What is the probability that I lose both games?

4/5

Q5.What is the probability that I lose the first game but win the second game?

5/5

#### 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.What is the probability that I win both games?

1/5

Q2.What is the probability that I win at least one game?

2/5

Q3.What is the probability that I win exactly one game?

3/5

Q4.What is the probability that I lose both games?

4/5

Q5.What is the probability that I lose the first game but win the second game?

5/5

# 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:

# Combined Events and Tree Diagrams 2

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

Q1.What is the probability that I lose all three games?

1/5

Q2.What is the probability that I win all three games?

2/5

Q3.What is the probability that I win at least one game?

3/5

Q4.What is the probability that I win exactly one game?

4/5

Q5.What is the probability that I win exactly two games?

5/5

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

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

# Combined Events and Tree Diagrams 2

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

Q1.What is the probability that I lose all three games?

1/5

Q2.What is the probability that I win all three games?

2/5

Q3.What is the probability that I win at least one game?

3/5

Q4.What is the probability that I win exactly one game?

4/5

Q5.What is the probability that I win exactly two games?

5/5

# Lesson summary: Combined events and tree diagrams (Part 2)

## Time to move!

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

For 5 mins...

Move around:
Walk

On the spot:
Chair yoga