Question

The class interval of the classes 0 – 7, 7 – 14,14 – 21 ………etc., is 

A) 0 

B) 7 

C) 9 

D) 8

Answer 1

Correct option is: B) 7

Class intervals 0-7, 7-14,14-21,..... are in exclusive form

\(\therefore\) Class interval of the classes = Upper limit - Lower limit 

= 7-0 or 14-7 or 21-14 or....

= 7

Hence, class interval of the classes 0.7, 7-14, 14-21,.....etc is 7.

Answer 2

Correct option is: B) 7