Question

The mean of first $10$ natural numbers is:

• A. $\frac{5}{2}$
• B. $\frac{11}{2}$
• C. $\frac{13}{2}$
• D. $5$

Answer 1

The correct option is B

$\frac{11}{2}$

Explanation for the correct option:

Find the mean:

Given that, observations are first $10$ natural numbers.

$Mean=\frac{sumofobservations}{totalnumberofobservations}$

$$\begin{gathered} \therefore mean=\frac{1+2+3+4+5+6+7+8+9+10}{10} \\ =\frac{55}{10} \\ =\frac{11}{2} \end{gathered}$$

Therefore, mean of first $10$ natural number is $\frac{11}{2}$.

Hence, the correct option is B.