Year 9
Year 9
Calculating the probability of combined events
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Lesson details
Key learning points
- In this lesson, we will look at how we can use area maps to calculate probabilities of combined events.
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
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5 Questions
Q1.
How many boys didn't do their homework?
13
14
22
Q2.
How many girls were there altogether?
14
29
8
Q3.
How many students were there altogether?
20
55
84
Q4.
What is the probability of randomly selecting a student who did their homework?
1/4
13/20
21/40
Q5.
Given that I select a girl, what is the probability that she didn't do her homework?
13/20
21/42
8/22
5 Questions
Q1.
I roll a fair six-sided dice. What is the probability I roll a 4 or a 6?
1/6
3/6
4/6
Q2.
What is the probability that both land on 2?
1/3
2/9
4/9
Q3.
What is the probability that they land on the same number?
1/2
1/9
2/9
Q4.
What is the probability that they land on different numbers?
1
2/9
8/9
Q5.
What is the probability that their sum is greater than 3?
1
3/6
8/9