Question

Write any two demerits of arithmetic mean with its definition

Answer 1

Arithmetic Mean: Arithmetic mean is that value which is obtained by dividing the sum of observations by the total no. of observations.
Arithmetic Mean $=\frac{Sumofobservations}{Numberofobservations}$
Demerits of Arithmetic Mean
(1) Sometimes, by computing mean we get such value which is practically not possible e.g., number of families is 3.8 or 5.6
(2) In the absence of anyone observation, the calculation is not possible.