Correct option is: D) 10
In inclusive class 1-10, upper limit 10 is also included.
\(\therefore\) Class interval = Upper limit -Lower limit + 1
= 10 -1 + 1
= 10
Alternative method :
Inclusive class is 1-10.
For finding class interval, we have to convert inclusive class into exclusive class.
For that we have to subtract 0.5 from lower limit of class and add 0.5 to upper limit of class
\(\therefore\) Exclusive form of class is 0.5 -10.5.
\(\therefore\) Class interval of inclusive class 1-10
= Class interval of exclusive class 0.5 - 10.5
= True upper limit - True lower limit
= 10.5 - 0.5 = 10
