Question

Find the median of first ten odd prime numbers.

Answer 1

Median $=\frac{1}{2}\left[\right(\frac{n}{2}{)}^{th}+(\frac{n}{2}+1{)}^{th}]$

$=\frac{1}{2}\left[\right(\frac{10}{2}{)}^{th}+(\frac{10}{2}+1{)}^{th}]$

$=\frac{1}{2}[5th+5th]$

$=\frac{13+17}{2}$

$=\frac{30}{2}=15.$