Maths

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Find probabilities from frequency trees

In this lesson, we will learn how to use frequency trees to find probabilities including revision on how to draw frequency trees given some information.

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.

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.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.

1/4

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.

2/4

Q3.This Venn diagram shows the number of students who study art, history and geography. Calculate P (Art ∩ Geography)

3/4

Q4.This Venn diagram shows the number of students who study art, history and geography. Calculate P(not history).

4/4

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.

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.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.

1/4

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.

2/4

Q3.This Venn diagram shows the number of students who study art, history and geography. Calculate P (Art ∩ Geography)

3/4

Q4.This Venn diagram shows the number of students who study art, history and geography. Calculate P(not history).

4/4

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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.

Unit quizzes are being retired in August 2023

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

Find probabilities from frequency trees

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

Q1.Here is some information regarding a sign language course taken by some students in year 10 and year 11. A student is randomly selected. What is the probability that they are in year 11?

1/3

Q2.Here is some information regarding a sign language course taken by some students in year 10 and year 11. A student is randomly selected. What is the probability that they passed the course?

2/3

Q3.Here is some information regarding a sign language course taken by some students in year 10 and year 11. A student is randomly selected. What probability scenario is represented by the fraction 50 out of 150?

3/3

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.

Unit quizzes are being retired in August 2023

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

Find probabilities from frequency trees

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

Q1.Here is some information regarding a sign language course taken by some students in year 10 and year 11. A student is randomly selected. What is the probability that they are in year 11?

1/3

Q2.Here is some information regarding a sign language course taken by some students in year 10 and year 11. A student is randomly selected. What is the probability that they passed the course?

2/3

Q3.Here is some information regarding a sign language course taken by some students in year 10 and year 11. A student is randomly selected. What probability scenario is represented by the fraction 50 out of 150?

3/3

Lesson summary: Find probabilities from frequency trees

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This was the final lesson in the unit Probability 2 (Sample space, Venn diagrams and experimental).

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