Year 11
Core
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Lesson details
Key learning points
- 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.
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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3 Questions
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?
A
B
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.
B
C
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.
A
B