Question 11 (a)
Use graph paper for this question. The marks obtained by 120 students in a
Mathematics test are given below:
Marks 0-10 10-20 | 20-30 | 30-40 40-50 50-60 60-70 70-80 80-90
No. of
5 9 16
students
22 26 18 11 6
4
90-100
3
Draw an ogive for the given distribution.
Use your ogive to estimate:
(i) the median.
(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.
[6
(b) From a point on level ground, the angle of elevation of the ton of our