Question

The mean of the first four counting number is________

Answer 1

The first four counting numbers are $1,2,3,4$

Mean$=\frac{Sumofallobservations}{Totalnumberofobservations}$

$$\begin{gathered} =\frac{1+2+3+4}{4} \\ =\frac{10}{4} \\ =2.5 \end{gathered}$$

Therefore, mean of first four counting numbers is $2.5$.