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Question
Observe the following data:
| Government School, Chandpur | ||
| Daily Attendance | Date: 15.4.2009 | |
| Class | Total Students | Number of Students Present on that Day |
| VI | 90 | 81 |
| VII | 82 | 76 |
| VIII | 95 | 91 |
| IX | 70 | 65 |
| X | 63 | 62 |
- Draw a double bar graph choosing an appropriate scale. What do you infer from the bar graph?
- Which class has the maximum number of students?
- In which class, the difference of total students and number of students present is minimum?
- Find the ratio of number of students present to the total number of students of Class IX.
- What per cent of Class VI students were absent?
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Solution
a. A double bar graph is shown below:
We infer from the bar graph that maximum number of students were absent in class VI on 15.04.2009, whereas minimum number of students were absent in class X.
b. Clearly, class VIII has maximum number of students, i.e. 95.
c. The difference of total number of students and number of students present is minimum for class X i.e. 63 – 62 = 1.
d. Number of students present in class IX = 65
Total number of students in class IX = 70
Hence, required ratio = `65/70 = 13/14` or 13 : 14
e. Total number of students in class VI = 90
Number of students present in class VI = 81
Number of absent students = 90 – 81 = 9
∴ Percentage of absent students of class VI
= `("Number of absent students"/"Total number of students" xx 100)%`
= `(9/90 xx 100)%`
= 10%
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