# NCERT Solutions for Class 7 Maths Chapter 3 Data and Handling

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NCERT Solutions for Class 7 Maths Chapter 3 Data and Handling- In everyday life, we deal with various types of data. Basically, data is the collection of information in the raw or an unorganized form such as numbers, alphabets or symbols that represent objects, ideas or conditions. In this chapter, we will learn how to represent and organize data in different ways so that their interpretation and analysis becomes better. This chapter contains 4 exercises with 23 questions. The NCERT Solutions for Class 7 Maths Chapter 3 Data and Handling are created by maths experts to help students in their preparation of CBSE final examination. These NCERT solutions are the detailed solution of each problem of NCERT Maths textbook of class 7.

We have learned to collect data and put it in the form of bar graphs. The collection and presentation of data help us organize our experiences and make conclusions from them. In NCERT Class 7 Maths Chapter 3 Data and Handling, we will take one more step towards figuring out how to do this. We will come across some more types of data and graphs. We have seen several kinds of data through magazines, television, newspapers, etc. And we know that all data give us some kind of information. The example of data that we have seen in daily life temperatures of cities on a particular day, weekly absentees in a class, etc. In Chapter 3 Data and Handling, students will also learn some important terms like arithmetic mean, range, mode, and median. So let's discuss terms one by one-

• Arithmetic Mean (A.M.) - The average or arithmetic mean or simply mean is defined by the sum of all observations divided by the number of observations.

$Mean=\frac{Sum \:of\:observations}{Number\:of\:observations}$

• Range- It is the difference between the highest observation and the lowest observation.
• Mode- Mode refers to the observation in a set of observation that occurs most often. For example, in group 12, 13, 13, 13, 16, 16, 24 and 30, the number 13 is the mode.
• Median- In a given data, arranged in order from lowest to highest, the median gives us the middle observation.

## Topics of NCERT Grade 7 Maths Chapter 3 Data and Handling-

3.1  Introduction

3.2  Collecting Data

3.3  Organisation of Data

3.4  Representative Values

3.5  Arithmetic Mean

3.5.1  Range

3.6  Mode

3.6.1  Mode of Large Data

3.7  Median

3.8  Use of Bar Graphs withe a Different Purpose

3.8.1 Choosing a Scale

3.9  Chance and Probability

3.9.1  Chance

The complete Solutions of NCERT Class 7 Mathematics Chapter 3 is provided below:

## NCERT Solutions for Class 7 Maths - Chapter-wise

 Chapter No. Chapter Name Chapter 1 Integers Chapter 2 Fractions and Decimals Chapter 4 Simple Equations Chapter 5 Lines and Angles Chapter 6 The Triangle and its Properties Chapter 7 Congruence of Triangles Chapter 8 Comparing Quantities Chapter 9 Rational Numbers Chapter 10 Practical Geometry Chapter 11 Perimeter and Area Chapter 12 Algebraic Expressions Chapter 13 Exponents and Powers Chapter 14 Symmetry