Question

find the mean of first nine prime numbers

Answer 1

The first 9 prime numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23
Mean = sum of all observation/no. of observations
          = (2+3+5+7+11+13+17+19+23)/9
          =  100/9
          = 11.111
  
            

Answer 2

Heya !!!

First 9 prime numbers are - 2,3,5,7,11,13,17,19,23

$Mean = \frac{sum \: \: of \: all \: \: observations}{number \: \: of \: \: observation} \\ \\ Mean = \frac{2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23}{9} \\ \\ Mean = \frac{100}{9} \\ \\ Mean = 11.11$


Hope it helps.