These class 11 maths handwritten notes chapter 14 probability have been carefully prepared for quick, one-shot revision before your CBSE Boards, JEE Main, JEE Advanced and CUET exams. Every page is written by hand with boxed formulas and clear sample-space diagrams, according to the latest 2026-27 CBSE syllabus.
Probability is the last chapter of Class 11 Maths and the base for the full probability course in Class 12. These handwritten pages turn the whole chapter into neat, colour-coded notes you can revise in one sitting.
- Boxed formulas for the probability of an event and the addition rule, ready to copy onto the answer sheet.
- Hand-drawn sample-space listings and Venn diagrams for events, so each outcome is clear at a glance.
- Pairs with the NCERT Solutions, Notes and Book PDF linked lower on this page.
What the Probability Handwritten Notes Cover
The notes open with the idea of a random experiment: an action whose outcome cannot be predicted in advance. They then move through the full chapter in the same order as the NCERT textbook, so nothing is missed. Each new sub-topic is written in red ink so students can find it fast during revision.
- Random experiments: outcomes, trials, and why the result is not fixed in advance.
- Sample space: the set S of all outcomes, written out for coins, dice and cards.
- Events: simple, compound, sure and impossible events, plus complementary events.
- Axiomatic probability: the axioms and the addition rule for the union of events.
Because these class 11 maths handwritten notes chapter 14 probability keep every definition inside a box, the eye jumps straight to the point. This makes them ideal for a last, fast recap the night before a test.
Key Formulas and Diagrams in the Notes
The core of the chapter is a small set of formulas and the event diagrams that go with them. The notes keep these together on one page so students can revise both at once. The table below lists the formulas the pages box in colour.
| Idea | Formula |
|---|---|
| Probability of an event E | P(E) = number of outcomes in E ÷ total outcomes in S |
| Range of any probability | 0 ≤ P(E) ≤ 1 |
| Sum over the whole sample space | P(S) = 1 |
| Complement of an event | P(not E) = 1 − P(E) |
| Addition rule for two events | P(A ∪ B) = P(A) + P(B) − P(A ∩ B) |
| Mutually exclusive events | P(A ∪ B) = P(A) + P(B), since P(A ∩ B) = 0 |
Each event type gets its own hand-drawn picture. The full rectangle is the sample space, and shaded regions mark event A, event B and their overlap. Seeing the shaded region is what makes the addition rule easy to recall in the exam.
How to Use These Handwritten Notes for Revision
Handwritten notes work best as a final layer of revision, not as your first read. The plan below helps students get the most out of the Probability handwritten notes in the run-up to the exam. Follow it once a week and again the day before the test.
- First pass: read the pages once, following the experiment-to-events order.
- Active recall: cover each boxed formula and write it from memory.
- Draw it: redraw the sample space for one coin, two coins and one die yourself.
- Self-test: solve two sums using the addition rule P(A ∪ B) to lock it in.
Because the class 11 maths handwritten notes chapter 14 probability come as a downloadable PDF, students can save them on a phone and revise offline on the way to the exam centre. Pair these pages with the full NCERT Solutions to check your written answers against model steps.
Student Feedback on the Probability Handwritten Notes
Student Feedback: In a Collegedunia poll of 10,820 Class 11 Maths students before the 2026 boards, 76% of students said writing out the sample space by hand made event problems far easier to set up than reading the text alone. Most students marked the addition rule as the formula they revised last before the exam.
Source: 2026-27 Class 11 Mathematics student poll. Sample of 10,820 students from CBSE schools across 14 states.
Other Probability Class 11 Maths Resources
These handwritten notes are a revision layer. To prepare fully, students should use them with the other resources for the same chapter, all linked in the table below. Read the notes, test yourself with the solutions, then open the book PDF for the original text.
| Resource | Best used for |
|---|---|
| Probability Class 11 NCERT Solutions | Step-by-step answers to every back-exercise question |
| Probability Class 11 Notes | Full chapter summary with all definitions and formulas in one place |
| Probability NCERT Book PDF | Reading the original NCERT chapter text and examples |
Tip: write out the sample space first, then apply the addition rule P(A ∪ B) from memory. That single habit fixes most event sums.
All Class 11 Maths Handwritten Notes by Chapter
The table links the handwritten notes for every chapter of Class 11 Maths, so students can move across the course in one click. Probability is highlighted.
| Chapter | Handwritten Notes |
|---|---|
| Chapter 1 | Sets |
| Chapter 2 | Relations and Functions |
| Chapter 3 | Trigonometric Functions |
| Chapter 4 | Complex Numbers and Quadratic Equations |
| Chapter 5 | Linear Inequalities |
| Chapter 6 | Permutations and Combinations |
| Chapter 7 | Binomial Theorem |
| Chapter 8 | Sequences and Series |
| Chapter 9 | Straight Lines |
| Chapter 10 | Conic Sections |
| Chapter 11 | Introduction to Three Dimensional Geometry |
| Chapter 12 | Limits and Derivatives |
| Chapter 13 | Statistics |
| Chapter 14 | Probability |
FAQs on Probability Handwritten Notes
Probability Handwritten Notes - Frequently Asked Questions
Ques. Are these class 11 maths handwritten notes chapter 14 probability free to download?
Ans. Yes. The Probability handwritten notes are free to download as a PDF from this page. They follow the 2026-27 CBSE syllabus and cover the full chapter in boxed, colour-coded pages for quick revision.
Ques. What topics do the Probability handwritten notes cover?
Ans. They cover random experiments and outcomes, the sample space, types of events, complementary events, the axiomatic definition of probability, and the addition rule for the union of two events, along with all the key formulas.
Ques. Which formula should I revise first in Probability?
Ans. Start with P(E) equal to the number of favourable outcomes divided by the total outcomes, and P(not E) = 1 minus P(E). Then learn the addition rule P(A union B) = P(A) + P(B) minus P(A intersection B), which the notes box in colour.
Ques. Are these notes enough for the Class 11 Probability exam?
Ans. They are a strong final revision layer. For full preparation, pair them with the NCERT Solutions linked on this page so you can write out complete answers and practise the event and addition-rule sums step by step.
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