Question

Find the mean of the first $10$ multiples of $3$?

Answer 1

Compute the required mean:

We know that the first ten multiples of $3$ are as follows $3,6,9.....30$

Since the formula of mean is given by:

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

Compute the required mean value.

$Mean=\frac{3+6+9+.....+30}{30}=\frac{165}{10}=16.5$

Hence, the required mean is $16.5$.