Calculating probabilities

In this lesson, we will look at calculating probabilities and putting events in order of likelihood. We will then calculate probabilities using spinners and number cards.

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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.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

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.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

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Worksheet

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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:

Calculating Probabilities

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

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

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:

Calculating Probabilities

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

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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