Question

the following table shows the cumulative frequency distribution of marks of 800 students in examination:
Marks: No of students:
Below 10. 8
Below 20 17
below 30 32
Below 40 62
Below 50 80
Below 60 80
Below 70 80
Below 80 80
Below 90 80
Below 100 80

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Answer 1

Explanation:

See the above attachment

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Answer 2

Marks            Frequency

0-10                         8

10-20                       17

20-30                      32

30-40                      62    

40-50                      80

50-60                      80

60-70                       80

70-80                       80

80-90                       80

90-100                     80

Hope it helps u !