Question

find the mean of first 20 natural numbers​

Answer 1

The first 20 natural numbers are :-

1 , 2 , 3 ,................, 17 , 18 , 19 , 20

Mean = Sum of all observations / No. of observations

===> ( 1 + 2 + 3 + ............ + 17 + 18 + 19 + 20 ) / 20

===> 210 / 20

===> 10.5