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Frequency related question

CPT 411 views 2 replies
Data given below refers to marks gained by a group of students
 
Class

Below 

10

Below

20

Below

30 

Below

40

Below

50

C.F

15

 

38

 

65

 

84

 

100

 

 

Find the no of students getting more than 30
marks.
a) 50 b) 53 c) 35 d) 52
 
Plz give your answer with explaination

 

Replies (2)
c) 35 ..............

class( less than)        frequancy        CF

0-10                                 15                    15

10-20                               23               38

20-30                               27                    65

30-40                               19                   84

40-50                               16                   100

Add more than 30 (19+16) answer is 35 


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