Question

Find the mean of first five multiples of 3.

Answer 1

The first five multiples of 3 are 3,6,9,12,15
mean of ungrouped data is sum of the data divided by no of numbers.
Mean= 3+6+9+12+15  = 45/5 =9
                   5

Answer 2

Answer:

The mean of the first five multiples of three is 9.

Solution:

The first 5 multiples of 3 = 3, 6, 9, 12, 15.

The mean value can be determined by the sum of the 5 numbers and the sum is divided by the total no. of numbers taken for finding the mean value.

∴ Mean of the first 5 multiples of 3

$= \frac  {(3+6+9+12+15)}{5}$

Then, the first 5 multiples of 3 are summed and the total value can be divided by 5 (total numbers).

$=\frac {45}{5}\\\\=9$

Thus, the mean of first five multiples of 3 is 9.