Question

Find the mean of the first 10 whole numbers.

Answer 1

Hint- In this question we have to find the mean of the first 10 whole numbers. Whole numbers are all non-negative integers which start from 0. Now the mean of the first 10 whole numbers will be the mean of numbers from 0 to 9, as the count of numbers from 0-9 is 10. Use this concept to reach the answer.

Mean of numbers is equal to the sum of the numbers divided by the count of the numbers that is
$Mean = \dfrac{{{\text{Sum of Numbers}}}}{{{\text{Count of Numbers}}}}$………………………………….. (1)
To find the mean of the first 10 whole numbers, we will find the sum of numbers from 0 to 9 as 0-9 are the first 10 whole numbers.
So, the sum of the first 10 whole numbers is 0+1+2+3+4+5+6+7+8+9=45.
Now putting the values in equation (1) we get, mean = $\dfrac{{45}}{{10}} = 4.5$
Hence, the mean of the first 10 whole numbers is 4.5.

Note- Whenever we face such types of problems the key point that we need to recall is that Mean or Arithmetic mean is the average of given numbers. It is found by calculating the sum of the given numbers and dividing it by how many numbers there are. These types of questions are totally based only on this definition and can be easily solved using this.