Question

Find the median of:

First nine odd prime numbers.

Answer 1

Step 1: Listing down the first nine odd prime numbers

The first nine odd prime numbers are $3,5,7,11,13,17,19,23,29$

Step 2: Finding the median of first nine odd prime numbers

The values are already arranged in ascending order : $3,5,7,11,13,17,19,23,29$

Number of values $=9$, which is odd

Median $={\left(\frac{9+1}{2}\right)}^{\mathrm{th}}\mathrm{observation}$

$={\left(\frac{10}{2}\right)}^{\mathrm{th}}\mathrm{observation}$

$=5^{\mathrm{th}}\mathrm{observation}=13$

Hence, the median of first nine odd prime numbers is $13$.