Question

The average of first 80 natural numbers is

Answer 1

40.5is an average of first 80 numbers 

Answer 2

40.5 is an average of first 80 natural numbers

Addressing the Input values:

The first 80 numbers

1, 2, 3, . . . . , 79, 80

Find the sum of first 80 natural numbers

By using A.P

$a_8_0=a_1+(n-1)d$

     $= 1 + (80-1)1$

     $= 1+79=80$

$S_8_0=\frac{n(a_1+a_n)}{2}$

     $=\frac{80(1+80)}{2}$

     $40(81) = 3240$

Divide the sum by 80

3240/80 = 40.5

40.5 is an average of first 80 natural numbers or positive integers.

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