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 |
Using the informations, given above draw an ogive on a graph sheet. Take a suitable scale for your ogive. Use the ogive to drawn to estimate :
(i) the median marks.
(ii) the number of students who obtained more than 75% marks in the test.
(iii) the number of students who did not pass in the test if the pass percentage was 40.
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