Question

The marks of 15 students in an examination are

25, 19, 17, 24, 23, 29, 31, 4, 19, 20, 22, 26, 17, 25, 21.

Find the median score.

Answer 1

By arranging the numbers in ascending order

We get

17, 17, 19, 19, 20, 21, 22, 23, 24, 25, 26, 29, 31, 35, 40

We know that n = 15 which is odd

So we get

Median = ½ (n + 1)th term

By substituting the values

Median = ½ (15 + 1)th term

It can be written as

Median = value of the 8^th term = 23

Therefore, the median score is 23.