Mathematics
Use a graph paper for this question:
The Marks out of 80 obtained by 160 students in a Mathematics test were recorded as given in the table:
| Marks | No. of students |
|---|---|
| 0 - 10 | 12 |
| 10 - 20 | 20 |
| 20 - 30 | 28 |
| 30 - 40 | 35 |
| 40 - 50 | 29 |
| 50 - 60 | 16 |
| 60 - 70 | 12 |
| 70 - 80 | 8 |
(Take 2 cm = 10 Marks on one axis and 2 cm = 20 students on the other axis).
Draw an Ogive and use it to find the following:
(a) median marks
(b) upper quartile marks
(c) number of students who scored above 65 marks
(d) the lowest marks scored by the top 30% students.
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