# The marks of 15 students in an examination are

Question:

The marks of 15 students in an examination are:
25, 19, 17, 24, 23, 29, 31, 40, 19, 20, 22, 26, 17, 35, 21.
Find the median score.

Solution:

Arranging the marks of 15 students in ascending order, we get:
17, 17, 19, 19, 20, 21, 22, 23, 24, 25, 26, 29, 31, 35, 40
Here, n is 15, which is an odd number.
We know

Median $=$ Value of $\left(\frac{n+1}{2}\right)$ th observation

Thus, we have:

Median score $=$ Value of $\left(\frac{15+1}{2}\right)$ th observation

$=$ Value of the 8 th observation

$=23$