b) The marks obtained by 120 students in a test are given below. [6]
Marks 0 -10 10- 20 20 -30 30- 40 40 -50 50- 60 60-70 70-80 80-90 90-100
No.of
studensts
5 9 16 22 26 18 11 6 4 3
Draw an ogive for the given distribution on a graph sheet. Use suitable scale for 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 the test, if minimum marks required
to pass is 40.
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