# Calculating probabilities

In this lesson we will look at calculating probabilities

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!

## Question 5

Q1.There are 20 guests at a party. 12 of them are drinking coffee and the rest are drinking tea. What is the probability of selecting one who is drinking tea?

1/5

Q2.There are 18 marbles in a bag. 13 of them are not green. What is the probability of selecting a green marble?

2/5

Q3.The probability that it rains tomorrow is 0.4. What is the probability it is sunny?

3/5

Q4.There are 100 cars in a car park. 40 of them are yellow. What is the probability of choosing a car that is not yellow?

4/5

Q5.The probability that it will snow tomorrow is 0.05. What is the probability that it won't snow?

5/5

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!

## Question 5

Q1.There are 20 guests at a party. 12 of them are drinking coffee and the rest are drinking tea. What is the probability of selecting one who is drinking tea?

1/5

Q2.There are 18 marbles in a bag. 13 of them are not green. What is the probability of selecting a green marble?

2/5

Q3.The probability that it rains tomorrow is 0.4. What is the probability it is sunny?

3/5

Q4.There are 100 cars in a car park. 40 of them are yellow. What is the probability of choosing a car that is not yellow?

4/5

Q5.The probability that it will snow tomorrow is 0.05. What is the probability that it won't snow?

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.

Quiz:

# Calculating Probabilities

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

## Question 5

Q1.What is the probability that this fair spinner lands on an odd number?

1/5

Q2.I roll a 10-sided dice. What is the probability I roll above a 5?

2/5

Q3.From the letters above, what is the probability of selecting a vowel?

3/5

Q4.I roll a 6-sided dice. What is the probability that I roll a number greater than 8?

4/5

Q5.What is the probability that this fair spinner lands on a white triangle?

5/5

Quiz:

# Calculating Probabilities

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

## Question 5

Q1.What is the probability that this fair spinner lands on an odd number?

1/5

Q2.I roll a 10-sided dice. What is the probability I roll above a 5?

2/5

Q3.From the letters above, what is the probability of selecting a vowel?

3/5

Q4.I roll a 6-sided dice. What is the probability that I roll a number greater than 8?

4/5

Q5.What is the probability that this fair spinner lands on a white triangle?

5/5

# Lesson summary: Calculating probabilities

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