# Conditional probability word problems

In this lesson, we will learn how to tackle conditional probability word problems. Prior knowledge of how to draw tree diagrams is essential to this lesson.

# 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:

# Conditional probability word problems

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

Q1.There are 10 counters in a bag. 4 counters are green and 6 counters are blue. Two counters are selected at random. If you want to calculate the probability that both are green, what calculation should you do?

1/3

Q2.There are 10 counters in a bag. 4 counters are green and 6 counters are blue. Two counters are selected at random. Calculate the probability that you get one of each colour.

2/3

Q3.There are 10 counters in a bag. 4 counters are green and 6 counters are blue. Two counters are selected at random. Calculate the probability that you get at least one blue.

3/3

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

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

# Conditional probability word problems

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

Q1.There are 10 counters in a bag. 4 counters are green and 6 counters are blue. Two counters are selected at random. If you want to calculate the probability that both are green, what calculation should you do?

1/3

Q2.There are 10 counters in a bag. 4 counters are green and 6 counters are blue. Two counters are selected at random. Calculate the probability that you get one of each colour.

2/3

Q3.There are 10 counters in a bag. 4 counters are green and 6 counters are blue. Two counters are selected at random. Calculate the probability that you get at least one blue.

3/3

# Lesson summary: Conditional probability word problems

## Time to move!

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

For 5 mins...

Move around:
Climb stairs

On the spot:
Chair yoga