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प्रश्न
Find the class-mark of the class 35 - 40.
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उत्तर
Class mark = `("Lower class limit" + "Upper class limit")/2`
Since, `(35 + 40)/2`
= `75/2`
= 37.5
So, the class mark for the class 35 - 40 is 37.5.
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संबंधित प्रश्न
For class interval 20-25 write the lower class limit and the upper class limit.
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| Classes (age) | Tally marks | Frequency (No. of students) |
| 12 - 13 | `cancel(bb|bb|bb|bb|)` | `square` |
| 13 - 14 | `cancel(bb|bb|bb|bb|)` `cancel(bb|bb|bb|bb|)` `bb|bb|bb|bb|` | `square` |
| 14 - 15 | `square` | |
| 15 - 16 | `bb|bb|bb|bb|` | `square` |
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| 22 | 6 |
| 24 | 7 |
| 26 | 13 |
| 28 | 4 |
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