Checking and securing calculating probabilities from diagrams
I can calculate probabilities from probability trees and Venn diagrams.
Checking and securing calculating probabilities from diagrams
I can calculate probabilities from probability trees and Venn diagrams.
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Lesson details
Key learning points
- The probability of an outcome can be found by considering a tree diagram
- The probability of an event can be found by considering a tree diagram
- The probability of an outcome can be found by considering a Venn diagram
- The probability of an event can be found by considering a Venn diagram
Keywords
Probability - The probability that an event will occur is the proportion of times the event is expected to happen in a suitably large experiment.
Frequency - The frequency is the number of times an event occurs; or the number of individuals (people, animals etc.) with some specific property.
Exhaustive events - A set of events are exhaustive if at least one of them has to occur whenever the experiment is carried out.
Mutually exclusive - Two or more events are are mutually exclusive if they share no common outcome.
Common misconception
Pupils may add the probabilities along branches of a probability tree, rather than multiplying them.
Remind pupils that probabilities cannot be greater than 1 and demonstrate that adding across the branches sometimes results in a probability that is greater than 1. Therefore, it must be wrong.
To help you plan your year 11 maths lesson on: Checking and securing calculating probabilities from diagrams, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 11 maths lesson on: Checking and securing calculating probabilities from diagrams, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Explore more key stage 4 maths lessons from the Conditional probability unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Lesson video
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Starter quiz
6 Questions
$$a$$ -
141
$$b$$ -
84
$$c$$ -
80
$$d$$ -
40
$$e$$ -
190
$$f$$ -
210
Exit quiz
6 Questions
P(lives in Oakfield) -
$$250\over400$$
P(doesn't live in Oakfield) -
$$150\over400$$
P(shops in-store) -
$$260\over400$$
P(shops online) -
$$140\over400$$
P(lives in Oakfield and shops online) -
$$100\over400$$
