Counting Principles
Counting principles, arrangements, selections and counting in probability.
Active lessons
4
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
4 of 4 active
Lesson 1
12A Counting Principles and Factorial Notation
Use the multiplication (fundamental counting) principle and factorial notation to count outcomes.
Lesson 2
12B Arrangements
Count arrangements where order matters: n distinct items in a row and r chosen in order from n.
Lesson 3
12C Selections
Count selections where order does not matter (combinations), distinct from arrangements.
Lesson 4
12D Counting in Probability
Use counting techniques to find probabilities as favourable over total outcomes.
Part of the Online Learning Package
Unit previews stay public, while individual lessons require active online learning access.