Question

MEAN OF FIRST 12 WHOLE NUMBER

Answer 1

Step by step explaination:

Sum of first n natural numbers is n(n+1)/2

so for 12 terms

sum = 12(12+1)/2 = 6×13 = 78

So 78 is the sum of first 12 natural numbers. So mean = sum of observations/ number of observations mean = 78/12 = 6.5

So mean is 6.5

hope it helps you

Answer 2

5.5 is the mean of first 12 whole numbers..

Given : The first 12 whole numbers.

To find : The mean of the first 12 whole numbers.

Solution :

We can simply solve this mathematical problem by using the following mathematical process. (our goal is to calculate the required mean)

The first 12 whole numbers :

= 0,1,2,3,4,5,6,7,8,9,10,11

Sum of first 12 whole numbers :

= 0+1+2+3+4+5+6+7+8+9+10+11

= 66

In this case,

• Sum of observations = Sum of first 12 whole numbers = 12
• Number of observations = 12 [As, there are 12 whole numbers]

Mean of first 12 whole numbers :

= Sum of observations ÷ Number of observations

= 66÷12

= 5.5

(This will be considered as the final result.)

Hence, 5.5 is the mean of first 12 whole numbers.