IP Maths Notes (Lower Sec, Year 1-2): 10) Probability Models
Download printable cheat-sheet (CC-BY 4.0)25 Nov 2025, 00:00 Z
Reviewed by
Marcus Pang·Managing Director (Maths)
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Q: What does IP Maths Notes (Lower Sec, Year 1-2): 10) Probability Models cover?
A: Construct sample spaces, tree diagrams, and evaluate independent and dependent events with clear notation.
Probability measures uncertainty. This final post develops sample space construction, event notation, and multi-stage probability models.
These notes align with MOE Lower Secondary Mathematics syllabus used in IP pathways (aligned to O-Level Mathematics 4048 foundations).
Status: MOE Lower Secondary Mathematics syllabus (latest release) checked 2025-11-30 - scope unchanged; remains the reference for these lower-sec notes.
Learning targets
- Express probabilities as fractions, decimals, or percentages with denominator greater than zero.
- Build sample spaces for single and combined events.
- Draw tree diagrams to track independent and dependent events.
- Apply complementary probability and conditional reasoning.
1. Probability basics
- Probability of event :
