The NCERT Solutions Class 9 Maths Chapter 7 Introduction to Probability cover every question from the new Ganita Manjari book. This chapter teaches you how likely an event is, from impossible to certain. You learn to count outcomes, write a sample space, and turn that count into a number between 0 and 1.
Chapter 7 Introduction to Probability — Exercise-wise NCERT Solutions
- Exercises solved: Exercise Sets 7.1, 7.2, 7.3, 7.4, and all 16 End-of-Chapter problems
- Main skills: ranking events, finding experimental probability, and listing a sample space
- Why it matters: it builds the base for probability and statistics in Class 10
These solutions are prepared by subject teachers, matched to the current 2026-27 NCERT, and checked step by step so a Class 9 student can follow each line.
What Does Class 9 Maths Chapter 7 Introduction to Probability Cover?
The chapter starts with a simple idea. Some events are sure to happen, some can never happen, and most sit in between. You learn to place any event on a scale from 0 to 1. You then list all the outcomes of an experiment, called the sample space, and use P(E)=favourabletotal. The NCERT Solutions Class 9 Maths Chapter 7 Introduction to Probability also show how real trials, like tossing a coin many times, give an experimental probability.
Video Walkthrough
Source: Magnet Brains on YouTube
Class 9 Maths Chapter 7 Introduction to Probability Exercise-Wise Breakdown
The chapter has four exercise sets and one long End-of-Chapter set. The table below shows what each part asks, so you can plan your practice.
| Exercise | Questions | What it covers |
|---|---|---|
| Exercise Set 7.1 | 1 | Ranking events on a scale from impossible to certain |
| Exercise Set 7.2 | 6 | Experimental probability from real trials like coin tosses |
| Exercise Set 7.3 | 3 | Writing the sample space of an experiment |
| Exercise Set 7.4 | 2 | Combined events and drawing items without replacement |
| End-of-Chapter Exercises | 16 | Mixed probability, sample space, and tree-diagram problems |
Common Mistakes Students Make in Introduction to Probability
Most errors in this chapter come from careless counting, not hard ideas. Fix these early and your marks stay safe.
- Writing a probability greater than 1, which can never happen.
- Missing an outcome when they list the sample space.
- Mixing up favourable outcomes with total outcomes in the fraction.
Sample Solved Question from Class 9 Maths Chapter 7
Here is one End-of-Chapter type question, solved step by step, so you can see the method.
Question: A bag has 3 candies: strawberry, lemon, and mint. One is picked at random. What is the probability of picking a strawberry candy?
Step 1. Write the sample space. The candies are S=strawberry, lemon, mint, so the total number of outcomes is n(S)=3.
Step 2. Count the favourable outcomes. Only one candy is strawberry, so there is 1 favourable outcome.
Step 3. Use the formula P(E)=favourabletotal.
Final answer. The probability is P(strawberry)=13.
How to Study Introduction to Probability and Time Needed
This is a short, activity-based chapter. If you try each experiment as you read, it goes fast. Start with the four exercise sets, then use the NCERT Solutions Class 9 Maths Chapter 7 Introduction to Probability to check your End-of-Chapter answers.
Revision mode
1-2 hours
If you have done this chapter once and are revising.
First-read
3-5 hours
If you are reading Introduction to Probability for the first time.
How will Collegedunia's NCERT Solutions Help You with Introduction to Probability?
Collegedunia gives you the full NCERT Solutions Class 9 Maths Chapter 7 Introduction to Probability as clean, step-by-step answers in one place.
- 2026-27 Ganita Manjari match: Every answer follows the new book, not the old chapter list.
- Full working shown: Each step is written out, so you never guess how a line was reached.
- Teacher checked: Subject experts verify each sample space and probability.
- Free PDF: Download the solutions and revise offline before your Class 9 annual exam.
More Introduction to Probability Maths Class 9 Resources
NCERT Solutions for Class 9 Maths: All Chapters
Use the table below to open the NCERT Solutions for any other chapter of the new Class 9 Maths book.
| Chapter | Resource |
|---|---|
| Chapter 1 | Coordinates NCERT Solutions |
| Chapter 2 | Linear Polynomials NCERT Solutions |
| Chapter 3 | The World of Numbers NCERT Solutions |
| Chapter 4 | Algebraic Identities NCERT Solutions |
| Chapter 5 | Circles NCERT Solutions |
| Chapter 6 | Perimeter and Area NCERT Solutions |
| Chapter 7 | Introduction to Probability NCERT Solutions |
| Chapter 8 | Sequences and Progressions NCERT Solutions |
Introduction to Probability Class 9 Maths NCERT Solutions FAQs
Ques. Where can I download Introduction to Probability Class 9 Maths NCERT Solutions PDF?
Ans. You can download the Introduction to Probability Class 9 Maths NCERT Solutions PDF directly from this page. Both the Normal and HD versions are free.
Ques. Is this chapter part of the new Class 9 Maths book?
Ans. Yes. Introduction to Probability is Chapter 7 of the new Ganita Manjari book for the 2026-27 syllabus. In the older book, probability came later, in Class 9 and Class 10.
Ques. How many exercises are there in Class 9 Maths Chapter 7?
Ans. There are four exercise sets, 7.1 to 7.4, and a set of 16 End-of-Chapter problems. Collegedunia solves all of them.
Ques. What is the basic probability formula in this chapter?
Ans. For equally likely outcomes, probability equals favourable outcomes divided by total outcomes. The answer is always a number between 0 and 1.
Ques. Is the Class 9 Maths Introduction to Probability solutions PDF hard to follow?
Ans. No. Each answer is written in short steps with the sample space shown, so a Class 9 student can read it on the first try.
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