Question

Find the mean of the first five composite numbers?

Answer 1

Compute the required mean:

According to the definition of composite numbers,

Composite numbers can be defined as the product of two positive numbers and composite numbers must have at least one divisor other than $1$ and the number itself.

The first five composite numbers are: $4,6,8,9,10$.

We know that the formula of the mean can be given as:

$\text{Mean=}\frac{\text{Sum of all the observations}}{\text{Total number of observations}}$

Mean calculation:

$Mean=\frac{4+6+8+9+10}{5}=\frac{37}{5}=7.4$

Hence, the mean of the first five composite numbers is $7.4$.