Equally likely outcomes
I can state when outcomes will be equally likely.
Equally likely outcomes
I can state when outcomes will be equally likely.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- A set of possible outcomes can be stated.
- Outcomes can be evaluated to decide how likely they are.
- Outcomes with the same likelihood can be identified.
Keywords
Outcome - An outcome is a result of a trial.
Likelihood - Likelihood describes the chance that a particular event will occur.
Trial - A trial is a single predefined test.
Sample space - A sample space is all the possible outcomes of a trial. A sample space diagram is a systematic way of producing a sample space.
Common misconception
Rolling a 6 on a dice is less likely to happen than rolling other numbers. Or ticket 001 is less likely to be drawn in a raffle than other tickets.
The random nature of picking a raffle or rolling a dice means all outcomes are equally likely as each other.
To help you plan your year 9 maths lesson on: Equally likely outcomes, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 9 maths lesson on: Equally likely outcomes, 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.
We use learning cycles to break down learning into key concepts or ideas linked to the learning outcome. Each learning cycle features explanations with checks for understanding and practice tasks with feedback. All of this is found in our slide decks, ready for you to download and edit. The practice tasks are also available as printable worksheets and some lessons have additional materials with extra material you might need for teaching the lesson.
The assessment exit quiz will test your pupils' understanding of the key learning points.
Our video is a tool for planning, showing how other teachers might teach the lesson, offering helpful tips, modelled explanations and inspiration for your own delivery in the classroom. Plus, you can set it as homework or revision for pupils and keep their learning on track by sharing an online pupil version of this lesson.
Explore more key stage 3 maths lessons from the Probability: possible outcomes 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 -
$${1}\over{4}$$
b -
$${1}\over{3}$$
c -
$${5}\over{12}$$
Exit quiz
6 Questions
trial -
a single predefined test
outcome -
a result of a trial
sample space -
all the possible outcomes of a trial
likelihood -
describes the chance that a particular event will occur
