# Find probabilities from Venn diagrams including basic set notation

In this lesson, we will learn how to calculate probabilities from Venn diagrams with 2 or more sets, including using the correct notation for union, intersect and complement. It is useful to have a knowledge of how to draw Venn diagrams prior to this lesson but this skill is revised.

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

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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.Marion rolls a dice thirty times and records the information in a relative frequency table. How could she make her experiment more reliable?

1/3

Q2.

2/3

Q3.A spinner labelled A, B, C and D is spun 20 times. The relative frequencies are in the table below. Which statement is not true?

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.Marion rolls a dice thirty times and records the information in a relative frequency table. How could she make her experiment more reliable?

1/3

Q2.

2/3

Q3.A spinner labelled A, B, C and D is spun 20 times. The relative frequencies are in the table below. Which statement is not true?

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:

# Find probabilities from Venn diagrams including basic set notation

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

Q1.Some children were asked if they owned a cat or a dog. A child is chosen at random. Calculate the probability that a child who owns a cat is chosen.

1/3

Q2.Some children were asked if they owned a cat or a dog. A child is chosen at random. Calculate the probability that a child who owns a dog or a cat is chosen.

2/3

Q3.This Venn diagram shows the number of students who study art, history and geography. Calculate P(not history).

3/3

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

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

# Find probabilities from Venn diagrams including basic set notation

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

Q1.Some children were asked if they owned a cat or a dog. A child is chosen at random. Calculate the probability that a child who owns a cat is chosen.

1/3

Q2.Some children were asked if they owned a cat or a dog. A child is chosen at random. Calculate the probability that a child who owns a dog or a cat is chosen.

2/3

Q3.This Venn diagram shows the number of students who study art, history and geography. Calculate P(not history).

3/3

# Lesson summary: Find probabilities from Venn diagrams including basic set notation

## Time to move!

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For 5 mins...

Move around:
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On the spot:
Dance