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प्रश्न
Construct a frequency distribution table for the following marks obtained by 25 students in a history test in class VIII 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?
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उत्तर
The frequency distribution table is given below:
| Age | Tally marks | Frequency |
| 9 | 6 | |
| 12 | |||| | 4 |
| 17 | |||| | 4 |
| 18 | || | 2 |
| 19 | |||| | 4 |
| 20 | ||| | 3 |
| 25 | || | 2 |
(i) The range of marks is 25-9, i.e. 16.
(ii) The highest mark is 25.
(iii) The mark that occurs most frequently is 9. It occurs 6 times.
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