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A survey of 120 school students was done to find which activity they prefer to do in their free time.
| Preferred activity | Number of students |
| Playing | 45 |
| Reading story books | 30 |
| Watching TV | 20 |
| Listening to music | 10 |
| Painting | 15 |
Draw a bar graph to illustrate the above data taking scale of 1 unit length = 5 students.
Which activity is preferred by most of the students other than playing?
By taking a scale of 1 unit length = 5 students, a bar graph of the above given data can be drawn as follows.
The activity that is preferred by most of the students, other than playing, is reading story books.
The number of Mathematics books sold by a shopkeeper on six consecutive days is shown below:
| Days | Number of books sold |
| Sunday | 65 |
| Monday | 40 |
| Tuesday | 30 |
| Wednesday | 50 |
| Thursday | 20 |
| Friday | 70 |
Draw a bar graph to represent the above information choosing the scale of your choice.
By taking a scale of 1 unit length = 10 books, a bar graph of the above given data can be drawn as follows.
Following table shows the number of bicycles manufactured in a factory during the years 1998 to 2002. Illustrate this data using a bar graph. Choose a scale of your choice.
| Years | Number of bicycles manufactured |
| 1998 1999 2000 2001 2002 | 800 600 900 1100 1200 |
(a) In which year was the maximum number of bicycles manufactured?
(b) In which year was the minimum number of bicycles manufactured?
By taking a scale of 1 unit length = 100 bicycles, a bar graph of the above given data can be drawn as follows.
(a) The number of bicycles manufactured in 2002 was the maximum, i.e., 1200.
(b) The number of bicycles manufactured in 1999 was the minimum, i.e., 600.
Number of persons in various age groups in a town is given in the following table.
| Age group | 1 − 14 | 15 − 29 | 30 − 44 | 45 − 59 | 60 −74 | 75 and above |
| Number of persons | 2 lakhs | 1 lakhs 60 thousands | 1 lakh 20 thousands | 1 lakh 20 thousands | 80 | 40 Thousands |
Draw a bar graph to represent the above information and answer the following questions. (take 1 unit length = 20 thousands)
(a) Which two age groups have same population?
(b) All persons in the age group of 60 and above are called senior citizens. How many senior citizens are there in the town?
By taking a scale of 1 unit length = 20 thousands, a bar graph of the above given data can be drawn as follows.
(a) 30 − 44 and 45 − 59 are the two age groups which have the same population.
(b) It can be inferred that senior citizens are the people who are either from age group 60 − 74 or from age group 75 and above.
Hence, number of senior citizens = 80,000 + 40,000
= 1 lakh 20 thousand
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