Mathematics
The marks obtained by 120 students in a Mathematics test are given below :
| Marks | No. of students |
|---|---|
| 0 - 10 | 5 |
| 10 - 20 | 9 |
| 20 - 30 | 16 |
| 30 - 40 | 22 |
| 40 - 50 | 26 |
| 50 - 60 | 18 |
| 60 - 70 | 11 |
| 70 - 80 | 6 |
| 80 - 90 | 4 |
| 90 - 100 | 3 |
Draw an ogive for the given distribution on a graph sheet. Use a suitable scale for your ogive. Use your ogive to estimate :
(i) the median
(ii) the number of students who obtained more than 75% marks in a test ?
(iii) the number of students who did not pass in the test if the pass percentage was 40?
(iv) the lower quartile.
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