find mean of first 15 natural numbers

Solution:

As we now that the natural numbers are those numbers which are used for counting i.e. 1,2,3, 4,etc.

So Mean = Sum of numbers divided by total number of numbers.

Mean = Sum of first fifteen natural numbers / total number of numbers

Formula for finding the sum of natural numbers = Sn = n(n+1)/2, where n = number of the numbers

Mean = n(n+1)/2 / n

Mean = 15(15 + 1)/2 / 15

= (15 x 16)/2 / 15

= 240/2 x 1/15

= 240/30 = 8

Ans: 8.