Question

Convert the given cumulative frequency table into a frequency distribution table.
Then find mean, median and mode
Marks No. of students
0 and above 120
20 and above 108
40 and above 90
60 and above 75
80 and above 50
100 and above 24
120 and above 9
140 and above 0

Answer 1

Answer:

120, 240,360,480,600,720,840,960..........

Answer 2

Answer:

Marks               No.of students

0-20                   12

20-40                 18

40-60                 15

60-80                 25

80-100                26

100-120               15

120-140                9