Question

how to find cf (cumlative frequency)

Answer 1

You can understand only with the example
frequency :- 1 2 3 4
So, the cf is 1 (1+2) (1+2+3) (1+2+3+4)
cf = 1 3 6 10

Answer 2

[To find cumlative frequency ]

[you must see the class asked]

[then go to less than type or more than or equal to type frequency ]

you will get cf

ex

Class. F Less than type

30-40 12 12

40-50 13 12+13 =25

50-60 10 10 +25 =35

Question

What is cumlative frequency of class 40-50?

Ans. 25

What is cumlative frequency of class
50-60 ?

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