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The mid-values of the class-intervals of...

The mid-values of the class-intervals of a frequency distribution are respectively 15,20,25,30,…… The class interval of which the mid-value is 20 is

A

`12.5-17.5`

B

`17.5-22.5`

C

`18.5-21.5`

D

`19.5-20.5`

Text Solution

Verified by Experts

The correct Answer is:
B
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