CBSE Class 9 Mathematics Probability Set 05

Welcome! Check out the CBSE Class 9 Mathematics Probability Set 05 built for the 2026-27 academic term. Get complete Class 9 Mathematics school assignments featuring key solved questions and answers for Chapter 15 Probability. Experienced teachers have designed these sheets following official guidelines from NCERT, CBSE, and KVS.

Solved Assignment for Class 9 Mathematics Chapter 15 Probability

Every Class 9 Mathematics student should solve these problems regularly to build strong core knowledge. These printable assignments offer a great way to test yourself on Chapter 15 Probability, featuring questions of all difficulty levels for better exam scores.

Chapter 15 Probability Questions & Answers for Class 9 Mathematics

Question :  A teacher wanted to analyse the performance of two sections of students in a mathematics test of 100 marks. Looking at their performances, she found that a few students got under 20 marks and a few got 70 marks or above. So she decided to group them into intervals of varying sizes as follows: 0 − 20, 20 − 30… 60 − 70, 70 −100. Then she formed the following table:
D-8
(i) Find the probability that a student obtained less than 20 % in the mathematics test.
(ii) Find the probability that a student obtained marks 60 or above. 
Answer:
Totalnumber of students = 90
(i) Number of students getting less than 20 % marks in the test = 7
D-9
 
Question : To know the opinion of the students about the subject statistics, a survey of 200 students was conducted. The data is recorded in the following table.
 
D-10
Find the probability that a student chosen at random
(i)likes statistics, (ii) does not like it
Answer:
 
D-11
Question : The distance (in km) of 40 engineers from their residence to their place of work were found as follows.
5 3 10 20 25 11 13 7 12 31
19 10 12 17 18 11 32 17 16 2
7 9 7 8 3 5 12 15 18 3
12 14 2 9 6 15 15 7 6 12
What is the empirical probability that an engineer lives:
(i) less than 7 km from her place of work?
(ii) more than or equal to 7 km from her place of work?
(iii) within 1/2 km from her place of work?
Answer:  (i) Total number of engineers = 40
Number of engineers living less than 7 km from their place of work = 9
 
D-12
 
Question :  Eleven bags of wheat flour, each marked 5 kg, actually contained the following weights of flour (in kg):
4.97 5.05 5.08 5.03 5.00 5.06 5.08 4.98 5.04 5.07 5.00
Find the probability that any of these bags chosen at random contains more than 5 kg of flour.
Answer:
Number of total bags = 11
Number of bags containing more than 5 kg of flour = 7
Hence, required probability,  P = 7/11 
 
 
Question :  
D-13
The above frequency distribution table represents the concentration of sulphur dioxide in the air in parts per million of a certain city for 30 days. Using this table, find the probability of the concentration of sulphur dioxide in the interval 0.12 − 0.16 on any of these days.
Answer:  Number days for which the concentration of sulphur dioxide was in the interval of
0.12 − 0.16 = 2
Total number of days = 30
Hence, required probability, P =2/30 = 1/15
 
Question :  
Blood group   Number of students
A                           9
B                           6
AB                         3
O                          12
Total                      30
The above frequency distribution table represents the blood groups of 30 students of a class. Use this table to determine the probability that a student of this class, selected at random, has blood group AB.
Answer:
Number of students having blood group AB = 3
Total number of students = 30
Hence, required probability, P =3/30 = 1/10
 
 
 
 

Free study material for Mathematics

Download Practice Assignments: Class 9 Mathematics Chapter 15 Probability

Chapter Practice Questions for Class 9 Mathematics

Download curated Chapter 15 Probability assignments aligned with current CBSE standards for Class 9. Built for comprehensive practice, the sheets incorporate MCQs, short answer questions, and long-form problems for Chapter 15 Probability. Save files easily in PDF format for offline use. Compiled by experienced educators, these tasks provide exact alignment with recurring school examination patterns.

Maximize Your Exam Scores with Class 9 Mathematics Assignments

  • Score Optimization: Proper understanding of Chapter 15 Probability gained via regular practice guarantees accurate test outputs.
  • Exam Relevance: All items map directly onto contemporary CBSE sample papers and structural schemas.
  • Extensive Variety: Offers Case Studies, multiple-choice options, and detailed descriptive problems with answers for Chapter 15 Probability.
  • Precision Tuning: Solving Chapter 15 Probability assignments consistently boosts overall response speed and accuracy.

Steps to Complete Chapter 15 Probability Assignments Successfully

  1. Textbook Review: Always study the core NCERT book for Class 9 Mathematics prior to beginning the assignment.
  2. Independent Attempt: Solve Chapter 15 Probability questions on your own initially before cross-checking with our expert solutions.
  3. Resource Support: Utilize our Revision Notes and Class 9 worksheets whenever you encounter difficult topics.
  4. Error Tracking: Record challenging concepts in a dedicated notebook and practice online MCQ tests for revision.

Expert Study Habits for Class 9 Mathematics Exams

For maximum performance, make it a habit to solve one assignment for Chapter 15 Probability daily. Incorporating a stopwatch during practice builds strong time-management reflexes required for official CBSE evaluations.

FAQs

Where can I download the latest CBSE Class 9 Mathematics Chapter 15 Probability assignments?

You can download free PDF assignments for Class 9 Mathematics Chapter 15 Probability from StudiesToday.com. These practice sheets have been updated for the 2026-27 session covering all concepts from latest NCERT textbook.

Do these Mathematics Chapter 15 Probability assignments include solved questions?

Yes, our teachers have given solutions for all questions in the Class 9 Mathematics Chapter 15 Probability assignments. This will help you to understand step-by-step methodology to get full marks in school tests and exams.

Are the assignments for Class 9 Mathematics Chapter 15 Probability based on the 2026 exam pattern?

Yes. These assignments are designed as per the latest CBSE syllabus for 2026. We have included huge variety of question formats such as MCQs, Case-study based questions and important diagram-based problems found in Chapter 15 Probability.

How can practicing Chapter 15 Probability assignments help in Mathematics preparation?

Practicing topicw wise assignments will help Class 9 students understand every sub-topic of Chapter 15 Probability. Daily practice will improve speed, accuracy and answering competency-based questions.

Can I download Mathematics Chapter 15 Probability assignments for free on mobile?

Yes, all printable assignments for Class 9 Mathematics Chapter 15 Probability are available for free download in mobile-friendly PDF format.