Probability
Extend probability to two-step experiments, tree diagrams, arrays and expected outcomes.
Active lessons
5
Status
Active
Lesson flow
Learn -> Guided Practice -> Independent Practice -> Mastery Quiz
How to use this unit
- Start from lesson 1 and move through the pathway in order.
- Use guided practice before attempting independent practice.
- Mastery quizzes check whether the skill is ready for review or extension.
Unit pathway
Lesson pathway
5 of 5 active
Lesson 1
Probability Language and Scale
Describe likelihood using words and the probability scale from 0 to 1.
Lesson 2
Simple Probability
Calculate P(event) = favourable outcomes ÷ total outcomes and apply the complement rule.
Lesson 3
Two-Step Chance Experiments
List all outcomes of two-step experiments using arrays and tree diagrams, and calculate combined probabilities.
Lesson 4
Relative Frequency
Calculate relative frequency from experimental results and explain how it approaches theoretical probability as trials increase.
Lesson 5
Expected Outcomes
Use expected count = P(event) × n to predict how many times an event will occur in a repeated experiment.
Part of the Online Learning Package
Unit previews stay public, while individual lessons require active online learning access.