The frequency distribution shows tha marks of 100 students in a Mathematics test.



Marks
1-10
11-20
21-30
31-40
41-50
51-60
61-70
71-80
81-90
91-100



No. of
Students

2
4
9
13
18
32
13
5
3
1



(a) Draw cumulative frequency curve for the distribution .
(b) Use your curve to estimate : (i) the median ; (ii) the lower quartile ; (iii) the 60th percentile.



The frequency distribution shows tha marks of 100 students in a Mathematics test.



Marks
1-10
11-20
21-30
31-40
41-50
51-60
61-70
71-80
81-90
91-100



No. of
Students

2
4
9
13
18
32
13
5
3
1
