Calculating the probability of combined events

In this lesson, we will look at how we can use area maps to calculate probabilities of combined events.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

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.How many boys didn't do their homework?
This frequency tree is incomplete.

1/5

Q2.How many girls were there altogether?

2/5

Q3.How many students were there altogether?

3/5

Q4.What is the probability of randomly selecting a student who did their homework?

4/5

Q5.Given that I select a girl, what is the probability that she didn't do her homework?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

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.How many boys didn't do their homework?
This frequency tree is incomplete.

1/5

Q2.How many girls were there altogether?

2/5

Q3.How many students were there altogether?

3/5

Q4.What is the probability of randomly selecting a student who did their homework?

4/5

Q5.Given that I select a girl, what is the probability that she didn't do her homework?

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.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Calculating the probability of combined events

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

Q1.I roll a fair six-sided dice. What is the probability I roll a 4 or a 6?

1/5

Q2.What is the probability that both land on 2?
I spin two three sided spinners.

2/5

Q3.What is the probability that they land on the same number?

3/5

Q4.What is the probability that they land on different numbers?

4/5

Q5.What is the probability that their sum is greater than 3?

5/5

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Calculating the probability of combined events

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

Q1.I roll a fair six-sided dice. What is the probability I roll a 4 or a 6?

1/5

Q2.What is the probability that both land on 2?
I spin two three sided spinners.

2/5

Q3.What is the probability that they land on the same number?

3/5

Q4.What is the probability that they land on different numbers?

4/5

Q5.What is the probability that their sum is greater than 3?

5/5

Lesson summary: Calculating the probability of combined events

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