PYQs
Practise questions grouped by chapter and source year.
Practice questions are organised using the years and labels in our source collection. Work through the solutions with your teacher; these are not a complete official examination paper.
Practice question 1
Source year: 20253 marksA bag contains 5 red and 3 blue balls. Two balls are drawn without replacement. Find probability both are red. [CBSE 2025]
Practice question 2
Source year: 20242 marksProve: P(A∪B) = P(A) + P(B) - P(A∩B). [CBSE 2024]
Formulae
Revisit important relationships and quick revision formulae.
Probability Laws
P(A∪B) = P(A) + P(B) - P(A∩B)\nP(A') = 1 - P(A)
Conditional Probability
P(A|B) = P(A∩B)/P(B)\nBayes' Theorem: P(A|B) = P(B|A)P(A)/P(B)
Notes
Build understanding with chapter guides and revision notes.
Understand the chapter
This is a chapter-wise rendering test file. It is not a full textbook chapter. It contains representative formulae, equations, diagrams, mechanisms, tables, and notation patterns useful for testing digitised CBSE/NCERT-style content.
Metadata
| Field | Value |
|---|---|
| Class | 12 |
| Subject | Mathematics |
| Chapter | 13. Probability |
| Test type | Markdown + LaTeX + Mermaid |
Key rendering targets
- Inline formulae like
- Block formulae using
$$ - Tables
- Diagrams using Mermaid
- Searchable plain text
- Future conversion to HTML, JSON, database, and app content
Probability rendering
Practice/testing prompts
- Check if all formulae render correctly.
- Check if the diagram appears in Obsidian or HTML.
- Mark this chapter as
pass,needs-plugin, orneeds-SVG.
Status
- Formulae checked
- Diagram checked
- HTML checked
- Mobile view checked
Comprehensive Notes: Probability
Introduction to Probability
These are the fundamental concepts and key takeaways for this chapter. Make sure to review these before exams.
- Key Concept 1
- Key Concept 2
- Important Definition
More detailed notes will be added here soon.
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