NCERT Class 11 Economics Chapter 3: Organisation of Data PDF Download

Chapter 3 of Class 11 Economics, Organisation of Data, explains how raw information or data is sorted and grouped to make it meaningful. After collecting data (as discussed in Chapter 2), it becomes important to organise it in a proper structure so that it can be analysed easily. This chapter introduces students to terms like classification, tabulation, frequency distribution, and more. It’s one of the most practical chapters in the Statistics portion of Economics.

I am writing this article because I’ve noticed that many students collect data but struggle to organise it properly. Whether you’re working on a school project, preparing a case study, or analysing market trends, you’ll need to arrange the data in a clear and logical way. This chapter is important because it teaches how to group data, make it presentable, and identify patterns. These are real-life skills that go beyond exams. Also, understanding how to classify and tabulate data is key for interpreting surveys, charts, and graphs in newspapers and reports. That’s why I feel this chapter deserves proper attention and a handy downloadable PDF for revision.

Key Concepts Covered in Chapter 3

In this chapter, students will learn how to convert a bunch of raw numbers into something meaningful using different methods of organisation.

Main topics include:

Meaning of organising data
Types of classification – chronological, geographical, qualitative, and quantitative
Frequency distribution – inclusive and exclusive
Tabulation of data and parts of a table

This chapter also teaches the use of classes, class intervals, tally marks, and how to prepare frequency tables.

Simple Example of Classification

Suppose students in a class scored between 0–100 marks. Instead of listing each mark, we can group them like this:

Marks Range	Number of Students
0–20	5
21–40	10
41–60	12
61–80	8
81–100	5

This type of table helps teachers and students understand the performance trend in just a glance.

Why You Should Not Skip This Chapter

It helps in summarising large data sets
Makes it easier to identify trends and patterns
Essential for graph-making and statistical analysis
Develops logical thinking by organising raw facts

If you’re planning to study commerce, economics, or business in college, the skill of data organisation will come in handy. Even in competitive exams, questions related to classification and tabulation are often asked.

Download PDF

Click Here to Download NCERT Class 11 Economics Chapter 3: Organisation of Data PDF

Download NCERT Class 11 Biology Chapter 17 Hindi PDF: गमन एवं संचलन

Movement and locomotion are two of the most exciting topics students learn in Class 11 Biology, especially in the Hindi medium. Chapter 17, गमन एवं संचलन, explains how living organisms move, how muscles function, how bones support the body, and how different systems work together to enable movement. This chapter builds a strong foundation for higher studies in biology, medicine, physiotherapy and sports science.

I am writing about this chapter because I know many students struggle to find the correct NCERT PDF in Hindi, especially when preparing for exams. Having a reliable, easy-to-download PDF helps students revise whenever needed. Chapter 17 is also important because it clears concepts that often appear in competitive exams like NEET, state-level entrance tests and school-level assessments. When students understand the basics such as types of joints, structure of muscles, skeletal system and movement disorders, it becomes much easier to answer application-based and diagram-related questions. In short, having quick access to this chapter in PDF format can really boost revision speed and help students stay confident before exams.

About NCERT Class 11 Biology Chapter 17: गमन एवं संचलन

NCERT’s Chapter 17 in the Hindi Biology textbook covers the complete mechanism of movement in humans and other organisms. It explains how our bones, muscles and joints coordinate to create motion.

The chapter mainly includes:

Types of movements
Skeletal system
Types of bones and joints
Structure of muscles
Muscle contraction process
Disorders related to movement

This chapter becomes very useful later when students study human physiology in Class 12 or prepare for entrance exams.

Key Topics Covered in Chapter 17

Here are the major concepts included in गमन एवं संचलन:

Locomotion and movement – Difference between the two, with real-life examples
Skeletal system – Axial skeleton, appendicular skeleton, functions of bones
Joints – Ball and socket, hinge joints, pivot joints, gliding joints
Muscle types – Skeletal, smooth, cardiac
Muscle structure – Sarcomere, actin, myosin
Mechanism of muscle contraction – Sliding filament theory
Disorders – Arthritis, osteoporosis, myasthenia gravis

Students often find diagrams related to muscle structure and types of joints very important for exams. So, having the PDF makes it easier to refer to the diagrams anytime.