Class 7 Exam > Class 7 Notes > Mathematics (Maths) Class 7 > RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data)
Data Handling – I (Collection & Organisation of Data) RD Sharma Solutions | Mathematics (Maths) Class 7 PDF Download
| Download, print and study this document offline |
Please wait while the PDF view is loading
Page 1
1. Define the following terms:
(i) Observations
(ii) Data
(iii) Frequency of an observation
(iv) Frequency distribution
Solution:
(i) Observation is the activity of paying close attention to someone or something in
order to get information in numerical form.
(ii) Data: The collection of observations is known as data.
(iii) Frequency of an observation: The number of times an observation occurs in a given
data is called the frequency of an observation.
(iv) Frequency distribution: It is a method of presenting raw data in a form that can be
easily understood.
2. The final marks in Mathematics of 30 students are as follows:
53, 61, 48, 60, 78, 68, 55, 100, 67, 90
75, 88, 77, 37, 84, 58, 60, 48, 62, 56
44, 58, 52, 64, 98, 59, 70, 39, 50, 60
(i) Arrange these marks in the ascending order. 30 to 39 one group, 40 to 49 second
group, etc.
(ii) What is the highest score?
(iii) What is the lowest score?
(iv) What is the range?
(v) If 40 is the pass mark how many have failed?
(vi) How many have scored 75 or more?
(vii) Which observations between 50 and 60 have not actually appealed?
(viii) How many have scored less than 50?
Solution:
(i) Ascending order of the numbers in groups:
Page 2
1. Define the following terms:
(i) Observations
(ii) Data
(iii) Frequency of an observation
(iv) Frequency distribution
Solution:
(i) Observation is the activity of paying close attention to someone or something in
order to get information in numerical form.
(ii) Data: The collection of observations is known as data.
(iii) Frequency of an observation: The number of times an observation occurs in a given
data is called the frequency of an observation.
(iv) Frequency distribution: It is a method of presenting raw data in a form that can be
easily understood.
2. The final marks in Mathematics of 30 students are as follows:
53, 61, 48, 60, 78, 68, 55, 100, 67, 90
75, 88, 77, 37, 84, 58, 60, 48, 62, 56
44, 58, 52, 64, 98, 59, 70, 39, 50, 60
(i) Arrange these marks in the ascending order. 30 to 39 one group, 40 to 49 second
group, etc.
(ii) What is the highest score?
(iii) What is the lowest score?
(iv) What is the range?
(v) If 40 is the pass mark how many have failed?
(vi) How many have scored 75 or more?
(vii) Which observations between 50 and 60 have not actually appealed?
(viii) How many have scored less than 50?
Solution:
(i) Ascending order of the numbers in groups:
(30-39): 37, 39
(40 – 49): 44, 48, 48
(50 – 59): 50, 52, 53, 55, 56, 58, 58, 59
(60 – 69): 60, 60, 60, 61, 62, 64, 67, 68
(70 – 79): 70, 75, 77, 78
(80 – 89): 84, 88
(90 – 99): 90, 98
(100-109): 100
(ii) The highest score is 100.
(iii) The lowest score is 37.
(iv) Range is = Maximum observation – Minimum observation.
= 100 – 37
= 63.
(v) If 40 is the pass mark, then only 2 students have failed.
(vi) 8 students have scored 75 or more.
(vii) 51, 54 and 57 are not there between 50 and 60.
(viii) 5 students scored less than 50.
3. The weights of new born babies (in kg) in a hospital on a particular day are as
follows:
2.3, 2.2, 2.1, 2.7, 2.6, 3.0, 2.5, 2.9, 2.8, 3.1, 2.5, 2.8, 2.7, 2.9, 2.4
(i) Rearrange the weights in descending order.
(ii) Determine the highest weight.
(iii) Determine the lowest weight.
(iv) Determine the range.
(v) How many babies were born on that day?
(vi) How many babies weigh below 2.5 kg?
(vii) How many babies weigh more than 2.8?
(viii) How many babies weigh 2.8 kg?
Page 3
1. Define the following terms:
(i) Observations
(ii) Data
(iii) Frequency of an observation
(iv) Frequency distribution
Solution:
(i) Observation is the activity of paying close attention to someone or something in
order to get information in numerical form.
(ii) Data: The collection of observations is known as data.
(iii) Frequency of an observation: The number of times an observation occurs in a given
data is called the frequency of an observation.
(iv) Frequency distribution: It is a method of presenting raw data in a form that can be
easily understood.
2. The final marks in Mathematics of 30 students are as follows:
53, 61, 48, 60, 78, 68, 55, 100, 67, 90
75, 88, 77, 37, 84, 58, 60, 48, 62, 56
44, 58, 52, 64, 98, 59, 70, 39, 50, 60
(i) Arrange these marks in the ascending order. 30 to 39 one group, 40 to 49 second
group, etc.
(ii) What is the highest score?
(iii) What is the lowest score?
(iv) What is the range?
(v) If 40 is the pass mark how many have failed?
(vi) How many have scored 75 or more?
(vii) Which observations between 50 and 60 have not actually appealed?
(viii) How many have scored less than 50?
Solution:
(i) Ascending order of the numbers in groups:
(30-39): 37, 39
(40 – 49): 44, 48, 48
(50 – 59): 50, 52, 53, 55, 56, 58, 58, 59
(60 – 69): 60, 60, 60, 61, 62, 64, 67, 68
(70 – 79): 70, 75, 77, 78
(80 – 89): 84, 88
(90 – 99): 90, 98
(100-109): 100
(ii) The highest score is 100.
(iii) The lowest score is 37.
(iv) Range is = Maximum observation – Minimum observation.
= 100 – 37
= 63.
(v) If 40 is the pass mark, then only 2 students have failed.
(vi) 8 students have scored 75 or more.
(vii) 51, 54 and 57 are not there between 50 and 60.
(viii) 5 students scored less than 50.
3. The weights of new born babies (in kg) in a hospital on a particular day are as
follows:
2.3, 2.2, 2.1, 2.7, 2.6, 3.0, 2.5, 2.9, 2.8, 3.1, 2.5, 2.8, 2.7, 2.9, 2.4
(i) Rearrange the weights in descending order.
(ii) Determine the highest weight.
(iii) Determine the lowest weight.
(iv) Determine the range.
(v) How many babies were born on that day?
(vi) How many babies weigh below 2.5 kg?
(vii) How many babies weigh more than 2.8?
(viii) How many babies weigh 2.8 kg?
Solution:
(i) Weights in descending order:
3.1, 3.0, 2.9, 2.9, 2.8, 2.8, 2.7, 2.7, 2.6, 2.5, 2.5, 2.4, 2.3, 2.2, 2.1
(ii) Highest weight: 3.1 Kg.
(iii) Lowest weight: 2.1 Kg.
(iv) Range = Maximum observation – Minimum observation
= (3.1-2.1) kg
= 1.0 Kg.
(v) A total of 15 babies were born on that day.
(vi) 4 babies weigh below 2.5 kg.
(vii) 4 babies weigh more than 2.8 kg.
(viii) 2 babies weigh 2.8 kg.
4. Following data gives the number of children in 40 families:
1, 2, 6, 5, 1, 5, 1, 3, 2, 6, 2, 3, 4, 2, 0, 0, 4, 4, 3, 2
2, 0, 0, 1, 2, 2, 4, 3, 2, 1, 0, 5, 1, 2, 4, 3, 4, 1, 6, 2
Represent it in the form of a frequency distribution.
Solution:
Required frequency table for given data is:
Number of Children Frequency
0 5
1 7
2 11
3 5
4 6
5 3
6 3
Page 4
1. Define the following terms:
(i) Observations
(ii) Data
(iii) Frequency of an observation
(iv) Frequency distribution
Solution:
(i) Observation is the activity of paying close attention to someone or something in
order to get information in numerical form.
(ii) Data: The collection of observations is known as data.
(iii) Frequency of an observation: The number of times an observation occurs in a given
data is called the frequency of an observation.
(iv) Frequency distribution: It is a method of presenting raw data in a form that can be
easily understood.
2. The final marks in Mathematics of 30 students are as follows:
53, 61, 48, 60, 78, 68, 55, 100, 67, 90
75, 88, 77, 37, 84, 58, 60, 48, 62, 56
44, 58, 52, 64, 98, 59, 70, 39, 50, 60
(i) Arrange these marks in the ascending order. 30 to 39 one group, 40 to 49 second
group, etc.
(ii) What is the highest score?
(iii) What is the lowest score?
(iv) What is the range?
(v) If 40 is the pass mark how many have failed?
(vi) How many have scored 75 or more?
(vii) Which observations between 50 and 60 have not actually appealed?
(viii) How many have scored less than 50?
Solution:
(i) Ascending order of the numbers in groups:
(30-39): 37, 39
(40 – 49): 44, 48, 48
(50 – 59): 50, 52, 53, 55, 56, 58, 58, 59
(60 – 69): 60, 60, 60, 61, 62, 64, 67, 68
(70 – 79): 70, 75, 77, 78
(80 – 89): 84, 88
(90 – 99): 90, 98
(100-109): 100
(ii) The highest score is 100.
(iii) The lowest score is 37.
(iv) Range is = Maximum observation – Minimum observation.
= 100 – 37
= 63.
(v) If 40 is the pass mark, then only 2 students have failed.
(vi) 8 students have scored 75 or more.
(vii) 51, 54 and 57 are not there between 50 and 60.
(viii) 5 students scored less than 50.
3. The weights of new born babies (in kg) in a hospital on a particular day are as
follows:
2.3, 2.2, 2.1, 2.7, 2.6, 3.0, 2.5, 2.9, 2.8, 3.1, 2.5, 2.8, 2.7, 2.9, 2.4
(i) Rearrange the weights in descending order.
(ii) Determine the highest weight.
(iii) Determine the lowest weight.
(iv) Determine the range.
(v) How many babies were born on that day?
(vi) How many babies weigh below 2.5 kg?
(vii) How many babies weigh more than 2.8?
(viii) How many babies weigh 2.8 kg?
Solution:
(i) Weights in descending order:
3.1, 3.0, 2.9, 2.9, 2.8, 2.8, 2.7, 2.7, 2.6, 2.5, 2.5, 2.4, 2.3, 2.2, 2.1
(ii) Highest weight: 3.1 Kg.
(iii) Lowest weight: 2.1 Kg.
(iv) Range = Maximum observation – Minimum observation
= (3.1-2.1) kg
= 1.0 Kg.
(v) A total of 15 babies were born on that day.
(vi) 4 babies weigh below 2.5 kg.
(vii) 4 babies weigh more than 2.8 kg.
(viii) 2 babies weigh 2.8 kg.
4. Following data gives the number of children in 40 families:
1, 2, 6, 5, 1, 5, 1, 3, 2, 6, 2, 3, 4, 2, 0, 0, 4, 4, 3, 2
2, 0, 0, 1, 2, 2, 4, 3, 2, 1, 0, 5, 1, 2, 4, 3, 4, 1, 6, 2
Represent it in the form of a frequency distribution.
Solution:
Required frequency table for given data is:
Number of Children Frequency
0 5
1 7
2 11
3 5
4 6
5 3
6 3
5. Prepare a frequency table of the following scores obtained by 50 students in a test:
42 51 21 42 37 37 42 49 38 52
7 33 17 44 39 7 14 27 39 42
42 62 37 39 67 51 53 53 59 41
29 38 27 31 54 19 53 51 22 61
42 39 59 47 33 34 16 37 57 43
Solution:
Required frequency-distribution table for given data:
Marks Number of Students
7 2
14 1
16 1
17 1
19 1
21 1
22 1
27 2
29 1
31 1
33 2
34 1
37 4
38 2
39 4
41 1
42 6
43 1
44 1
47 1
49 1
51 3
52 1
53 3
54 1
Page 5
1. Define the following terms:
(i) Observations
(ii) Data
(iii) Frequency of an observation
(iv) Frequency distribution
Solution:
(i) Observation is the activity of paying close attention to someone or something in
order to get information in numerical form.
(ii) Data: The collection of observations is known as data.
(iii) Frequency of an observation: The number of times an observation occurs in a given
data is called the frequency of an observation.
(iv) Frequency distribution: It is a method of presenting raw data in a form that can be
easily understood.
2. The final marks in Mathematics of 30 students are as follows:
53, 61, 48, 60, 78, 68, 55, 100, 67, 90
75, 88, 77, 37, 84, 58, 60, 48, 62, 56
44, 58, 52, 64, 98, 59, 70, 39, 50, 60
(i) Arrange these marks in the ascending order. 30 to 39 one group, 40 to 49 second
group, etc.
(ii) What is the highest score?
(iii) What is the lowest score?
(iv) What is the range?
(v) If 40 is the pass mark how many have failed?
(vi) How many have scored 75 or more?
(vii) Which observations between 50 and 60 have not actually appealed?
(viii) How many have scored less than 50?
Solution:
(i) Ascending order of the numbers in groups:
(30-39): 37, 39
(40 – 49): 44, 48, 48
(50 – 59): 50, 52, 53, 55, 56, 58, 58, 59
(60 – 69): 60, 60, 60, 61, 62, 64, 67, 68
(70 – 79): 70, 75, 77, 78
(80 – 89): 84, 88
(90 – 99): 90, 98
(100-109): 100
(ii) The highest score is 100.
(iii) The lowest score is 37.
(iv) Range is = Maximum observation – Minimum observation.
= 100 – 37
= 63.
(v) If 40 is the pass mark, then only 2 students have failed.
(vi) 8 students have scored 75 or more.
(vii) 51, 54 and 57 are not there between 50 and 60.
(viii) 5 students scored less than 50.
3. The weights of new born babies (in kg) in a hospital on a particular day are as
follows:
2.3, 2.2, 2.1, 2.7, 2.6, 3.0, 2.5, 2.9, 2.8, 3.1, 2.5, 2.8, 2.7, 2.9, 2.4
(i) Rearrange the weights in descending order.
(ii) Determine the highest weight.
(iii) Determine the lowest weight.
(iv) Determine the range.
(v) How many babies were born on that day?
(vi) How many babies weigh below 2.5 kg?
(vii) How many babies weigh more than 2.8?
(viii) How many babies weigh 2.8 kg?
Solution:
(i) Weights in descending order:
3.1, 3.0, 2.9, 2.9, 2.8, 2.8, 2.7, 2.7, 2.6, 2.5, 2.5, 2.4, 2.3, 2.2, 2.1
(ii) Highest weight: 3.1 Kg.
(iii) Lowest weight: 2.1 Kg.
(iv) Range = Maximum observation – Minimum observation
= (3.1-2.1) kg
= 1.0 Kg.
(v) A total of 15 babies were born on that day.
(vi) 4 babies weigh below 2.5 kg.
(vii) 4 babies weigh more than 2.8 kg.
(viii) 2 babies weigh 2.8 kg.
4. Following data gives the number of children in 40 families:
1, 2, 6, 5, 1, 5, 1, 3, 2, 6, 2, 3, 4, 2, 0, 0, 4, 4, 3, 2
2, 0, 0, 1, 2, 2, 4, 3, 2, 1, 0, 5, 1, 2, 4, 3, 4, 1, 6, 2
Represent it in the form of a frequency distribution.
Solution:
Required frequency table for given data is:
Number of Children Frequency
0 5
1 7
2 11
3 5
4 6
5 3
6 3
5. Prepare a frequency table of the following scores obtained by 50 students in a test:
42 51 21 42 37 37 42 49 38 52
7 33 17 44 39 7 14 27 39 42
42 62 37 39 67 51 53 53 59 41
29 38 27 31 54 19 53 51 22 61
42 39 59 47 33 34 16 37 57 43
Solution:
Required frequency-distribution table for given data:
Marks Number of Students
7 2
14 1
16 1
17 1
19 1
21 1
22 1
27 2
29 1
31 1
33 2
34 1
37 4
38 2
39 4
41 1
42 6
43 1
44 1
47 1
49 1
51 3
52 1
53 3
54 1
57 1
59 2
61 1
62 1
67 1
6. A die was thrown 25 times and following scores were obtained:
1 5 2 4 3
6 1 4 2 5
1 6 2 6 3
5 4 1 3 2
3 6 1 5 2
Prepare a frequency table of the scores.
Solution:
Required frequency table:
Score Number of times
1 5
2 5
3 4
4 3
5 4
6 4
7. In a study of number of accidents per day, the observations for 30 days were
obtained as follows:
6 3 5 6 4 3 2 5 4 2
4 2 1 2 2 0 5 4 6 1
6 0 5 3 6 1 5 5 2 6
Prepare a frequency distribution table.
Solution:
Required frequency table for given data:
Number of accidents Number of Days
0 2
1 3
Read More
|
76 videos|345 docs|39 tests
|
Related Exams
About this Document
|
4.70/5 Rating |
|
Nov 22, 2024 Last updated |
Document Description: RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) for Class 7 2024 is part of Mathematics (Maths) Class 7 preparation.
The notes and questions for RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) have been prepared according to the Class 7 exam syllabus. Information about RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) covers topics
like and RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) Example, for Class 7 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data).
Introduction of RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) in English is available as part of our Mathematics (Maths) Class 7
for Class 7 & RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) in Hindi for Mathematics (Maths) Class 7 course.
Download more important topics related with notes, lectures and mock test series for Class 7
Exam by signing up for free. Class 7: Data Handling – I (Collection & Organisation of Data) RD Sharma Solutions | Mathematics (Maths) Class 7
Description
Full syllabus notes, lecture & questions for Data Handling – I (Collection & Organisation of Data) RD Sharma Solutions | Mathematics (Maths) Class 7 - Class 7 | Plus excerises question with solution to help you revise complete syllabus for Mathematics (Maths) Class 7 | Best notes, free PDF download
Information about RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data)
In this doc you can find the meaning of RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) defined & explained in the simplest way possible. Besides explaining types of
RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) theory, EduRev gives you an ample number of questions to practice RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) tests, examples and also practice Class 7
tests
|
Explore Courses for Class 7 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Extra Questions
,practice quizzes
,Previous Year Questions with Solutions
,Sample Paper
,Summary
,Exam
,Objective type Questions
,Free
,Viva Questions
,Data Handling – I (Collection & Organisation of Data) RD Sharma Solutions | Mathematics (Maths) Class 7
,ppt
,Semester Notes
,Important questions
,MCQs
,Data Handling – I (Collection & Organisation of Data) RD Sharma Solutions | Mathematics (Maths) Class 7
,video lectures
,shortcuts and tricks
,study material
,mock tests for examination
,past year papers
,Data Handling – I (Collection & Organisation of Data) RD Sharma Solutions | Mathematics (Maths) Class 7
;
Additional Information about RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) for Class 7 Preparation
RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) Free PDF Download
The RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) is an invaluable resource that delves deep into the core of the Class 7 exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) now and kickstart your journey towards success in the Class 7 exam.
Importance of RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data)
The importance of RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) cannot be overstated, especially for Class 7 aspirants.
This document holds the key to success in the Class 7 exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) Notes
RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data).
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) Notes on EduRev are your ultimate resource for success.
RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) Class 7 Questions
The "RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) Class 7 Questions" guide is a valuable resource for all aspiring students preparing for the
Class 7 exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) on the App
Students of Class 7 can study RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data),
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of RD Sharma Solutions: Data Handling – I (Collection & Organisation of Data) is prepared as per the latest Class 7 syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup