Question

The median of first 8 prime numbers is

(a) 7 (b) 9 (c) 11 (d) 13

Answer 1

The first 8 prime numbers are 2, 3, 5, 7, 11, 13, 17 and 19.

median = average of $\frac{n}{2}$ and $\frac{n}{2}+1$ terms
=> average of 4th and 5th terms
=>$\frac{7+11}{2}$
=> $\frac{18}{2}=9$