Question

Let I be the lower class limit of a class-inerval in a frequency distribution and m be the mid-point of the class. Then, the upper class limit of the class is

• A. $M+\frac{l+m}{2}$
• B. $l+\frac{l+m}{2}$
• C. $2m-l$
• D. $m-2l$

Answer 1

The correct option is C

$2m-l$

l is the lower class limit of a class interval m is the mid point of the class

$m=\frac{u+l}{2}$ $\Rightarrow 2m=u+l$

$\Rightarrow u=2m-l$

Then, upper class limit $=2m-l$