
CBSE Important Questions›

CBSE Previous Year Question Papers›
 CBSE Previous Year Question Papers
 CBSE Previous Year Question Papers Class 12
 CBSE Previous Year Question Papers Class 10

CBSE Revision Notes›

CBSE Syllabus›

CBSE Extra Questions›

CBSE Sample Papers›
 CBSE Sample Papers
 CBSE Sample Question Papers For Class 5
 CBSE Sample Question Papers For Class 4
 CBSE Sample Question Papers For Class 3
 CBSE Sample Question Papers For Class 2
 CBSE Sample Question Papers For Class 1
 CBSE Sample Question Papers For Class 12
 CBSE Sample Question Papers For Class 11
 CBSE Sample Question Papers For Class 10
 CBSE Sample Question Papers For Class 9
 CBSE Sample Question Papers For Class 8
 CBSE Sample Question Papers For Class 7
 CBSE Sample Question Papers For Class 6

ISC & ICSE Syllabus›

ICSE Question Paper›
 ICSE Question Paper
 ISC Class 12 Question Paper
 ICSE Class 10 Question Paper

ICSE Sample Question Papers›
 ICSE Sample Question Papers
 ISC Sample Question Papers For Class 12
 ISC Sample Question Papers For Class 11
 ICSE Sample Question Papers For Class 10
 ICSE Sample Question Papers For Class 9
 ICSE Sample Question Papers For Class 8
 ICSE Sample Question Papers For Class 7
 ICSE Sample Question Papers For Class 6

ICSE Revision Notes›
 ICSE Revision Notes
 ICSE Class 9 Revision Notes
 ICSE Class 10 Revision Notes

ICSE Important Questions›

Maharashtra board›

RajasthanBoard›
 RajasthanBoard

Andhrapradesh Board›
 Andhrapradesh Board
 AP Board Sample Question Paper
 AP Board syllabus
 AP Board Previous Year Question Paper

Telangana Board›

Tamilnadu Board›

NCERT Solutions Class 12›
 NCERT Solutions Class 12
 NCERT Solutions Class 12 Economics
 NCERT Solutions Class 12 English
 NCERT Solutions Class 12 Hindi
 NCERT Solutions Class 12 Maths
 NCERT Solutions Class 12 Physics
 NCERT Solutions Class 12 Accountancy
 NCERT Solutions Class 12 Biology
 NCERT Solutions Class 12 Chemistry
 NCERT Solutions Class 12 Commerce

NCERT Solutions Class 10›

NCERT Solutions Class 11›
 NCERT Solutions Class 11
 NCERT Solutions Class 11 Statistics
 NCERT Solutions Class 11 Accountancy
 NCERT Solutions Class 11 Biology
 NCERT Solutions Class 11 Chemistry
 NCERT Solutions Class 11 Commerce
 NCERT Solutions Class 11 English
 NCERT Solutions Class 11 Hindi
 NCERT Solutions Class 11 Maths
 NCERT Solutions Class 11 Physics

NCERT Solutions Class 9›

NCERT Solutions Class 8›

NCERT Solutions Class 7›

NCERT Solutions Class 6›

NCERT Solutions Class 5›
 NCERT Solutions Class 5
 NCERT Solutions Class 5 EVS
 NCERT Solutions Class 5 English
 NCERT Solutions Class 5 Maths

NCERT Solutions Class 4›

NCERT Solutions Class 3›

NCERT Solutions Class 2›
 NCERT Solutions Class 2
 NCERT Solutions Class 2 Hindi
 NCERT Solutions Class 2 Maths
 NCERT Solutions Class 2 English

NCERT Solutions Class 1›
 NCERT Solutions Class 1
 NCERT Solutions Class 1 English
 NCERT Solutions Class 1 Hindi
 NCERT Solutions Class 1 Maths

JEE Main Question Papers›

JEE Main Syllabus›
 JEE Main Syllabus
 JEE Main Chemistry Syllabus
 JEE Main Maths Syllabus
 JEE Main Physics Syllabus

JEE Main Questions›
 JEE Main Questions
 JEE Main Maths Questions
 JEE Main Physics Questions
 JEE Main Chemistry Questions

JEE Main Mock Test›
 JEE Main Mock Test

JEE Main Revision Notes›
 JEE Main Revision Notes

JEE Main Sample Papers›
 JEE Main Sample Papers

JEE Advanced Question Papers›

JEE Advanced Syllabus›
 JEE Advanced Syllabus

JEE Advanced Mock Test›
 JEE Advanced Mock Test

JEE Advanced Questions›
 JEE Advanced Questions
 JEE Advanced Chemistry Questions
 JEE Advanced Maths Questions
 JEE Advanced Physics Questions

JEE Advanced Sample Papers›
 JEE Advanced Sample Papers

NEET Eligibility Criteria›
 NEET Eligibility Criteria

NEET Question Papers›

NEET Sample Papers›
 NEET Sample Papers

NEET Syllabus›

NEET Mock Test›
 NEET Mock Test

NCERT Books Class 9›
 NCERT Books Class 9

NCERT Books Class 8›
 NCERT Books Class 8

NCERT Books Class 7›
 NCERT Books Class 7

NCERT Books Class 6›
 NCERT Books Class 6

NCERT Books Class 5›
 NCERT Books Class 5

NCERT Books Class 4›
 NCERT Books Class 4

NCERT Books Class 3›
 NCERT Books Class 3

NCERT Books Class 2›
 NCERT Books Class 2

NCERT Books Class 1›
 NCERT Books Class 1

NCERT Books Class 12›
 NCERT Books Class 12

NCERT Books Class 11›
 NCERT Books Class 11

NCERT Books Class 10›
 NCERT Books Class 10

Chemistry Full Forms›
 Chemistry Full Forms

Biology Full Forms›
 Biology Full Forms

Physics Full Forms›
 Physics Full Forms

Educational Full Form›
 Educational Full Form

Examination Full Forms›
 Examination Full Forms

Algebra Formulas›
 Algebra Formulas

Chemistry Formulas›
 Chemistry Formulas

Geometry Formulas›
 Geometry Formulas

Math Formulas›
 Math Formulas

Physics Formulas›
 Physics Formulas

Trigonometry Formulas›
 Trigonometry Formulas

CUET Admit Card›
 CUET Admit Card

CUET Application Form›
 CUET Application Form

CUET Counselling›
 CUET Counselling

CUET Cutoff›
 CUET Cutoff

CUET Previous Year Question Papers›
 CUET Previous Year Question Papers

CUET Results›
 CUET Results

CUET Sample Papers›
 CUET Sample Papers

CUET Syllabus›
 CUET Syllabus

CUET Eligibility Criteria›
 CUET Eligibility Criteria

CUET Exam Centers›
 CUET Exam Centers

CUET Exam Dates›
 CUET Exam Dates

CUET Exam Pattern›
 CUET Exam Pattern
Class 7 Mathematics Revision Notes Chapter 3
CBSE Class 7 Mathematics Revision Notes Chapter 3 – Data Handling
The Class 7 Mathematics Chapter 3 Notes are designed in a way so that students can understand the basic and advanced concepts of the topic clearly. The experts use simplified and accessible language to construct the topics included in the CBSE revision notes. Students can rely on the notes as they are created according to the latest CBSE guidelines and CBSE syllabus. Extramarks recommends that candidates should refer to the NCERT books and revision notes to score good marks in the final examinations. Candidates can also access study materials such as CBSE previous year question papers, CBSE sample papers, CBSE extra questions, including many more from Extramarks.
Revision Notes for CBSE Class 7 Mathematics Chapter 3
Notes On Data Handling
 Double bar graph: It is considered a reliable tool to compare and contrast different values of two particular quantities, having the same observation.
For example: If in a class 6 students have scored well in mathematics and science. So through a double bar graph, we can analyze the performance of each student.
 Averages:
An average or mean of a data set can be found with addition of all the numbers given in the data set and then dividing the sum by the number of values in a data set.
The formula for arithmetic mean and range is as follows:
Mean = sum of all observations / total number of observations
 Median:
If the given data is arranged specifically in descending or ascending order, then the observation present in the middle has termed the median of that particular data.
Example: Suppose a group of people have a different number of apples: 10, 15, 20, 30, 25, 40, 35
Now the observation in ascending order will be: 10, 15, 20, 25, 30, 35, 40
Hence, the median value in this scenario will be 25 as it is the middle term.
 Mode:
The term that can get repeated most of the time in a given observation is known as a mode.
Example: Suppose a given set of numbers is 2,2,2,9,9,6,7,5
So the mode of this sequence is 2, as it is getting repeated most of the time.
 Probability
The chance of the occurrence of any particular event or incidence is known as probability.
The set of all the possible outcomes that can occur for a particular event is known as sample space.
Example: Experiment: Tossing of coin, sample space (S) = {H, T}
Importance of Extramarks Revision Notes
The Class 7 Mathematics Revision Notes Chapter 3 are designed for students preparing for their final examinations. All the information added in the notes is collected by the experts from NCERT books. Extramarks recommends that candidates should study the CBSE revision notes for exam preparation. In addition, they can also access study materials such as CBSE sample papers, CBSE previous year question papers, CBSE extra questions, and important questions, among many more, through the platform.
The most important topics covered in the Class 7 Mathematics Chapter 3 Notes are given below.
 Chance and probability In case of a chance, the occurrence of any event is a rare prediction wherein its happening is not sure. However, probability is a measurement. In this, there are probable chances of an event.
 Use of bar graphs for different purposes – Bar charts or Bar Graphs is a way to present the data in a visual format for recognising trends or patterns.
 Median – Median refers to the middle value which is obtained when the data set is arranged from lowest to greatest number.
 Mode – The number that is repeated or occurs the most number of times in a data set is mode.
 Range – The difference between greatest value and lowest value in a data set is called as Range.
 Arithmetic mean – The ratio of the sum of all the given observations to total number of observations given in a data set is termed as arithmetic mean.
 Representation values – The number that is closest or nearest to the real value of the measurement is called representation values.
 Organisation of data – In this, first the raw data is organised, then it is classified in different categories. This process is called Data Organization.
 Collecting data – In data collection, information is gathered and measured on variables of interest. This helps in answering the research questions, in testing hypothesis and then evaluating the outcomes. This process is called data collection.
 Introduction to data handling – This refers to the process of understanding about the data and thereafter handling it. In this, data is collected and then is presented in different forms.
The Class 7 Chapter 3 Mathematics Notes can help the student with a quick revision of the key concepts. It can help the candidates to get better clarity on the type of questions asked in the examination.
FAQs (Frequently Asked Questions)
1. List all the topics covered in Chapter 3 Mathematics Class 7 Notes.
The Class 7 Mathematics Chapter 3 Notes cover all the important questions and topics required to score well in the final examination. A detailed list of the most significant topics is given below.
 Chance and probability
 Use of bar graphs with different purposes
 Median
 Mode
 Range
 Arithmetic mean
 Representation of values
 The organization of data
 Collecting data
 Introduction to data handling
2. What is the median according to the topics covered in Class 7 Mathematics Notes Chapter 3?
The median is defined as data organized in ascending order, from the smallest digital to the largest.The middle term in the ascending order organization of the data is known as the median of the given data.