NCERT Solutions for Class 7 Maths Chapter 3

NCERT Solutions for Class 7 Maths Chapter 3 Data Handling Exercise 3.1, Exercise 3.2, Exercise 3.3 and Exercise 3.4 in English & प्रश्नावली 3.1, प्रश्नावली 3.2

2, प्रश्नावली 3.3 and प्रश्नावली 3.4 in Hindi Medium free to download in PDF. Videos related to chapter 3 all exercises are prepared in such a way, students can understand solutions easily. NCERT Solutions 2020-21 are updated for the current academic session 2020-2021. All the NCERT Solutions are based on updated NCERT Textbooks 2020-21.




NCERT Solutions for Class 7 Maths Chapter 3

Class:7
Subject:Maths – गणित
Chapter 3:Data Handling

7 Maths Chapter 3 Solutions

7 Maths Chapter 3 Data Handling all exercises solutions with complete explanation are given below. No login or password is required to access these solutions for the session 2020-21.




About NCERT Solutions for Class 7 Maths Chapter 3

In 7 Maths Chapter 3 Data Handling, we will study about statistics section of mathematics, which includes the collection of data and then their proper representation to understand easily. The following are the tools or methods to representations:
1. Arithmetic Mean: The most common representative value of a group of data is the arithmetic mean or the mean. The average or Arithmetic Mean (A.M.) or simply mean is defined as the sum of observations divided by number of observations.
2. Range: The difference between the highest and the lowest observation is called the range of the observation.
3. Mode: The mode of a set of observations is the observation that occurs most often.
4. Median: After arranging the data in ascending or descending order, the median gives us the middle observation.




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The above mentioned term provide us a numerical value related to our data. but the Bar Graph provides us a visual representation about the collected data. The concept of probability is also introduced in this chapter. There are situations in our life, that are certain to happen, have probability 1. Some that are impossible and some that may or may not happen, have probability 0.



Important Questions on Class 7 Maths Chapter 3

The scores in mathematics test (out of 25) of students is as follows: 19, 25, 23, 20, 9, 20, 15, 10, 5, 16, 25, 20, 24, 12, 20. Find the mode and median of this data. Are they same?
Arranging the given data in ascending order,
5, 9, 10, 12, 15, 16, 19, 20, 20, 20, 20, 23, 24, 25, 25

Mode is the observation occurred the highest number of times.
Therefore, Mode = 20

Median is the middle observation = 20

Yes, Mode and Median are same of given observation.

एक कक्षा के 15 विद्यार्थियों के भार (in kg) इस प्रकार हैं: 38, 42, 35, 37, 45, 50, 32, 43, 43, 40, 36, 38, 43, 38, 47. इन आँकड़ों का बहुलक ज्ञात कीजिए।
दिए गए आँकड़ों को आरोही क्रम में व्यवस्थित करने पर:
32, 35, 36, 37, 38, 38, 38, 40, 42, 43, 43, 43, 45, 47, 50
आँकड़ों में सबसे अधिक बार आने वाला प्रेक्षण बहुलक होता है।
इसलिए, बहुलक = 38 और 43
मध्य वाला (बीच वाला) प्रेक्षण माध्यक होता है। इसलिए, माध्यक = 40
Find the mode and median of the data: 13, 16, 12, 14, 19, 12, 14, 13, 14.
Arranging the given data in ascending order,
12, 12, 13, 13, 14, 14, 14, 16, 19
Mode is the observation occurred the highest number of times = 14
Median is the middle observation = 14
Tell whether the statement is true or false: The mode is always one of the numbers in a data.
True.
एक डिब्बे में 6 कंचे हैं, जिन पर 1 से 6 संख्याएँ अंकित हैं। संख्या 2 वाले कंचे को इसमें से निकालने की प्रायिकता क्या है?
एक ही कंचे पर संख्या 2 अंकित है।
P (संख्या 2 आने की प्रायिकता) = 1/6
यह निर्णय लेने के लिए कि कौन – सी टीम खेल प्रारंभ करेगी, एक सिक्का उछाला जाता है। इसकी क्या प्रायिकता है कि आपकी टीम खेल प्रारंभ करेगी?
सिक्के को उछालने पर कुल संभावनाएँ (चित या पट) = 2
इसलिए, चित या पट आने के प्रायिकता समान होती है।
P (हमारी टीम खेल प्रारंभ करेगी) = 1/2

NCERT Solutions for Class 7 Maths Chapter 3 Data Handling
NCERT Solutions for Class 7 Maths Chapter 3 Exercise 3.1
NCERT Solutions for Class 7 Maths Chapter 3 Exercise 3.1 in pdf form
NCERT Solutions for Class 7 Maths Chapter 3 Exercise 3.1 in english medium
NCERT Solutions for Class 7 Maths Chapter 3 Exercise 3.2
NCERT Solutions for Class 7 Maths Chapter 3 Exercise 3.2 in english pdf free download
NCERT Solutions for Class 7 Maths Chapter 3 Exercise 3.3
NCERT Solutions for Class 7 Maths Chapter 3 Exercise 3.3 pdf
NCERT Solutions for Class 7 Maths Chapter 3 Exercise 3.3 in english medium
NCERT Solutions for Class 7 Maths Chapter 3 Exercise 3.4
7 Maths Exercise 3.1
7 Maths Exercise 3.1 solutions in hindi medium
7 Maths Exercise 3.1 in pdf download free
7 Maths Exercise 3.1 all questions guide free
7 Maths Exercise 3.1 for mp board
7 Maths Exercise 3.2 in pdf form free download
7 Maths Exercise 3.2 in hindi
7 Maths Exercise 3.3
7 Maths Exercise 3.3 solutions in pdf free download
7 Maths Exercise 3.3 in hindi medium
7 Maths Exercise 3.4