Question

Find the mean of first 10 prime numbers.

Answer 1

The first 10 prime numbers are: 

2,3,5,7, 11, 13, 17, 19,23,29 

`barx = (x_1 + x_2 + x_3 + .... +x_n)/n`

n = 10

⇒ `barx = (2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29)/10`

⇒ `barx = 129/10`

⇒ `barx = 12.9`

Therefore , Mean of first 10 prime numbers = 12.9