Question

Find mean of first five natural numbers.

Answer 1

Hint: We will begin by writing the first five natural numbers, which are 1,2,3,4 and 5. Calculate the sum of these numbers. Then find the mean of the first five natural numbers using the formula, $\text{Average}={\displaystyle \frac{\text{Sum of observations}}{\text{Number of observations}}}$

Complete step-by-step answer:
Natural numbers are the numbers that help in counting.
For example, the numbers 1,2,3,4,….. are natural numbers.
Hence, the first five natural numbers are 1,2,3,4 and 5.
We have to find the mean of the first five natural numbers.
The mean is calculated by dividing the sum of observations by the number of observations.
We will find the sum of observations by adding all the first five natural numbers.
$1+2+3+4+5=15$
We will divide this by the number of observations, that is by 5
${\displaystyle \frac{15}{5}}=3$
Hence, the mean of the first five natural numbers is 3.

Note: Mean is also known as average of the data. Many students consider 0 as a natural number, which is incorrect. The smallest natural number is 1, while 0 is the smallest whole number.