Question

Find the mean of the first five prime numbers?

Answer 1

Compute the required mean:

Prime numbers are numbers with only two factors: the number one and the number itself. We know that, $2,3,5,7$ and $11$ are the first five prime numbers.

The mean is computed by dividing the sum of observations by the number of observations.

Therefore, to calculate the mean we have,

$$\begin{gathered} \Rightarrow \frac{2+3+5+7+11}{5}=\frac{28}{5} \\ \Rightarrow =5.6 \end{gathered}$$

Hence, the mean of the first five prime numbers is $5.6$.