Question

Marks
0-20
20-40
40-60
60-80
80-100
Number of students
15
18
20
29
P
The median marks of a students is 57.
a
Cumulative frequency of the median class
1) 53 ii) 33 iii) 74 iv) 20
b
Lower limit of modal class
i) 20
ii) 40
iii) 60
iv) 80
Number of students who got mark less than 80
i) 17 ii) 18 iii) 19 iv) 82
d
Mean mark is
i) 52.4
ii) 53.4
iii) 54.4
iv) 51.4
Class mark of the class 40-60
i) 40 ii)60
iii) 50 iv) 20
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Answer 1

Step-by-step explanation:

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