Calculate probabilities of dependent events

A lesson to calculate probabilities of outcomes for dependent events from tree diagrams

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.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

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.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

Video

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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:

Calculate probabilities of dependent events

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

Q1.Amy is going to pick 2 biscuits from a box. Some are chocolate and some are plain. The probability tree shows the probability information.

1/3

Q2.James is also going to pick 2 biscuits from a box. Some are chocolate and some are plain. The probability tree shows the probability information.

2/3

Q3.Here is a probability tree showing Amir taking red and blue sweets from a bag.

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.

Quiz:

Calculate probabilities of dependent events

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

Q1.Amy is going to pick 2 biscuits from a box. Some are chocolate and some are plain. The probability tree shows the probability information.

1/3

Q2.James is also going to pick 2 biscuits from a box. Some are chocolate and some are plain. The probability tree shows the probability information.

2/3

Q3.Here is a probability tree showing Amir taking red and blue sweets from a bag.

3/3

Lesson summary: Calculate probabilities of dependent events

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Time to move!

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For 5 mins...

Move around:
Jog

On the spot:
Chair yoga

This was the final lesson in the unit Probability 3 (Tree diagrams).

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