20
The distribution below gives the marks obtained by 80 students on a test :
Marks
Less than 10
Less than 20
Less than 30
Less than 40
Less than 50
Less than 60
Number of Students
3
12
27
57
75
80
The modal class of this distribution is :
Marks
Less than 10
Less than 20
Less than 30
Less than 40
Less than 50
Less than 60
Number of Students
3
12
27
57
75
80
The modal class of this distribution is :
- (a)10-20
- (b)20-30
- (c)30-40
- (d)50-60
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(C) 30-40