Question

What is mean of first five prime numbers ?

• A. $3.6$
• B. $4.9$
• C. $5.6$
• D. $5$

Answer 1

The correct option is C

$5.6$

First five prime numbers are :

$2,3,5,7,11$

Sum of first five prime numbers $=2+3+5+7+11$

$=28$

Mean $=\frac{\text{sum of first five prime numbers}}{5}$

$=\frac{28}{5}$

$=5.6$

Mean of first five prime numbers are $\mathbf{5}\mathbf{.}\mathbf{6}$.

So, (c) is the correct option.