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From following table, what is the cumulative frequency of less than type for the class 30 – 40?

Class Frequency
0 - 10 7
10 - 20 3
20 - 30 12
30 - 40 13
40 - 50 2

(A) 13 

(B) 15 

(C) 35 

(D) 22

1 Answer

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Best answer

(C) 35

Cumulative frequency of less than type for the class 30 – 40 

= 7 + 3 + 12 + 13 = 35

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