Refer to the below data table and answer the following question.
Marks Number of students
40 and above 25
30 and above 49
20 and above 78
10 and above 99
0 and above 118
How many students have scored marks 20 or more but less than 40?

From the table, we have cumulative frequency data:
Number of students who scored 20 and above = 78

Number of students who scored 40 and above = 25

The number of students scoring 20 or more but less than 40 is the difference between these two categories:

Number of students=(Students ≥20)−(Students ≥40)
Number of students=78−25=53