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प्रश्न
Observe the following frequency polygon and write the answers of the questions below it.
- Which class has the maximum number of students?
- Write the classes having zero frequency.
- What is the class-mark of the class, having frequency of 50 students?
- Write the lower and upper class limits of the class whose class mark is 85.
- How many students are in the class 80-90?
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उत्तर
- The class 60 - 70 has the maximum number of students, i.e., 60.
- The classes 20 - 30 and 90 - 100 have zero frequency.
- The class-mark of the class having frequency of 50 students is 55.
- The lower and upper class limits of the class having class marks of 85 are 80 and 90.
- Number of students in the class 80-90 are 15.
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संबंधित प्रश्न
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| Waiting time (in seconds) |
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| 0 -30 | 15 |
| 30 - 60 | 23 |
| 60 - 90 | 64 |
| 90 - 120 | 50 |
| 120 - 150 | 5 |
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| No. of Students | 4 | 8 | 14 | 19 | 5 |
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| Time (minutes) | 60 - 80 | 80 - 100 | 100 - 120 | 120 - 140 | 140 - 160 |
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| Number of families | 200 | 240 | 300 | 50 |
The marks scored by students in Mathematics in a certain examination are given below :
| Marks Scored | Number of Students |
| 0 - 20 | 6 |
| 20 - 40 | 9 |
| 40 - 60 | 14 |
| 60 - 80 | 16 |
| 80 - 100 | 5 |
Draw histogram for the above data.
Draw the histogram for the following frequency distribution and hence estimate the mode for the distribution.
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| 0 - 5 | 2 |
| 5 - 10 | 7 |
| 10 - 15 | 18 |
| 15 - 20 | 10 |
| 20 - 25 | 8 |
| 25 - 30 | 5 |
| Total | 24 |
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| Under 5 | 1 |
| Under 10 | 12 |
| Under 15 | 19 |
| Under 20 | 26 |
| Under 25 | 27 |
| Under 30 | 35 |
| Under 35 | 38 |
| Under 40 | 45 |
| Under 45 | 48 |
| Under 50 | 53 |
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- Make a frequency table with respect to the class boundaries and their corresponding frequencies.
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