Class 7 Exam > Class 7 Notes > RD Sharma Solutions for Class 7 Mathematics > RD Sharma Solutions (Part - 2)- Ex-22.1, Data Handling I Collection Organisation Data, Class 7
RD Sharma Solutions (Part - 2)- Ex-22.1, Data Handling I Collection Organisation Data, Class 7 | RD Sharma Solutions for Class 7 Mathematics PDF Download
Question 7:
In a study of number of accidents per day, the observations for 30 days were obtained as follows:
Prepare a frequency distribution table.
Answer 7:
Required frequency-distribution table:
| Number of Accidents | Number of Days |
| 0 | 2 |
| 1 | 3 |
| 2 | 6 |
| 3 | 3 |
| 4 | 4 |
| 5 | 6 |
| 6 | 6 |
Question 8:
Prepare a frequency table of the following ages (in years) of 30 students of class VIII in your school:
| 13, 14, 13, 12, 14, 13, 14, 15, 13, 14, 13, 14, 16, 12, 14 13, 14, 15, 16, 13, 14, 13, 12, 17, 13, 12, 13, 13, 13, 14 |
Answer 8:
Frequency Distribution Table is :
| Ages (in years) | Number of Students |
| 12 | 4 |
| 13 | 12 |
| 14 | 9 |
| 15 | 2 |
| 16 | 2 |
| 17 | 1 |
Question 9:
Following figures relate the weekly wages (in Rs.) of 15 workers in a factory:
| 300, 250, 200, 250, 200, 150, 350, 200, 250, 200, 150, 300, 150, 200, 250 |
Prepare a frequency table.
(i) What is the range in wages (in Rs)?
(ii) How many Workers are getting Rs 350?
(iii) How many workers are getting the minimum wages?
Answer 9:
Frequency Distribution Table is
| Wages (in Rs.) | No. of Workers |
| 150 | 3 |
| 200 | 5 |
| 250 | 4 |
| 300 | 2 |
| 350 | 1 |
(i) The range in wages (in Rs.) = 350 -150 = 200.
(ii) Only 1 worker is getting Rs. 350.
(iii) 3 workers are getting the minimum wages, i.e, Rs. 150.
Question 10:
Construct a frequency distribution table for the following marks obtained by 25 students in a history test in class VI of a school:
| 9, 17, 12, 20, 9, 18, 25, 17, 19, 9, 12, 9, 12, 18, 17, 19, 20, 25, 9, 12, 17, 19, 19, 20, 9 |
(i) What is the range of marks?
(ii) What is the highest mark?
(iii) Which mark is occurring more frequently?
Answer 10:
Required frequency-distribution table:
| Marks | Frequency |
| 9 | 6 |
| 12 | 4 |
| 17 | 4 |
| 18 | 2 |
| 19 | 4 |
| 20 | 3 |
| 25 | 2 |
(i) Range of marks: 25-9=16.
(ii) The highest mark is 25.
(iii) 9 is occurring most frequently.
Question 11:
In a mathematis test following marks were obtained by 40 students of class VI. Arrange these marks in a table using, tally marks.
(i) Find how many students obtained marks equal to or more than 7?
(ii) How many students obtaned marks below 4?
Answer 11:
The Frequency Distribution Table is :
| Marks | Tally Marks | Frequency |
| 1 | II | 2 |
| 2 | III | 3 |
| 3 | III | 3 |
| 4 |  | 7 |
| 5 |  | 6 |
| 6 | | 7 |
| 7 |  | 5 |
| 8 | IIII | 4 |
| 9 | III | 3 |
(i) 12 students obtained marks equal to or more than 7.
(ii) Only 8 students obtained marks below 4.
Question 12:
Following is the choice of sweets of 30 students of class VI: Ladoo, Barfi, Ladoo, Jalebi, Ladoo, Rasgulla, Jalebi, Ladoo, Barfi, Rasgulla, Ladoo, Jalebi, Jalebi Rasgulla, Ladoo, Rasgulla, Jalebi, Ladoo, Rasgulla, Ladoo, Rasgulla, Jalebi, Ladoo, Rasgulla, Ladoo, Ladoo, Barfi, Rasgulla, Rasgulla, Ladoo.
(i) Arrange the names of sweets in a table using tally marks.
(ii) Which sweet is preferred by most of the students.
Answer 12:
(ii) Ladoo is preferred by most of the students, 12 students.
The document RD Sharma Solutions (Part - 2)- Ex-22.1, Data Handling I Collection Organisation Data, Class 7 | RD Sharma Solutions for Class 7 Mathematics is a part of the Class 7 Course RD Sharma Solutions for Class 7 Mathematics.
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FAQs on RD Sharma Solutions (Part - 2)- Ex-22.1, Data Handling I Collection Organisation Data, Class 7 - RD Sharma Solutions for Class 7 Mathematics
| 1. What is data handling and why is it important? |  |
Ans. Data handling refers to the process of organizing, manipulating, and analyzing data in order to extract meaningful information from it. It is important because it helps in making informed decisions, identifying patterns and trends, and understanding the characteristics of the data.
| 2. How can data be organized in data handling? | |
Ans. Data can be organized in data handling through various methods such as creating tables, graphs, charts, and diagrams. It can also be organized using statistical techniques like grouping data into classes or categories.
| 3. What is the purpose of data collection in data handling? | |
Ans. The purpose of data collection in data handling is to gather relevant information or facts about a particular topic or subject. This data can then be analyzed and used to draw conclusions, make predictions, or solve problems.
| 4. What are the different types of data in data handling? | |
Ans. In data handling, there are two main types of data: qualitative data and quantitative data. Qualitative data describes qualities or characteristics, while quantitative data represents quantities or numerical values.
| 5. How can data be analyzed in data handling? | |
Ans. Data can be analyzed in data handling through various methods such as calculating measures of central tendency (mean, median, mode), measures of dispersion (range, variance, standard deviation), and creating graphs or charts to visualize the data. Statistical techniques like hypothesis testing can also be used for data analysis.
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