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प्रश्न
The following are the marks scored by the students in the Summative Assessment exam
| Class | 0 − 10 | 10 − 20 | 20 − 30 | 30 − 40 | 40 − 50 | 50 − 60 |
| No. of Students | 2 | 7 | 15 | 10 | 11 | 5 |
Calculate the median.
उत्तर
| Class Interval | No. of students frequency |
Cumulative frequency |
| 0 − 10 | 2 | 2 |
| 10 − 20 | 7 | 9 |
| 20 − 30 | 15 | 24 |
| 30 − 40 | 10 | 34 |
| 40 − 50 | 11 | 45 |
| 50 − 60 | 5 | 50 |
| N = 50 |
`"N"/2 = 50/2`
= 25
Here l = 30, f = 10, m = 24 and c = 10
Median = `"l" + (("N"/2 - "m") xx "c")/f`
= `30 + ((25 - 24)10)/10`
= 30 + 1
= 31
∴ Median = 31
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