Question

find the mean of first 10 prime number

Answer 1

mean=(2+3+5+7+11+13+17+19+23+29)/2
=129/2=64.5

Answer 2

A prime number is the number which have only two divisors which are one and itself.
First ten prime no 's = 2,3,5,7,11,13,17,19,23,29
Total number of observations = 10
Mean = Sum of all Observations / Total number of Observations
= (2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29) / 10
= 129 / 10 = 12.9