Find the median number of magazines purchased in a store by 4 customers. 10, 55, 34, 21

Median of 10, 55, 34, 21

First we arrange number in ascending or descending

10, 21, 34, 55 in ascending.

Median is the middle number and this is between 21 and 34.

We find the average:

(21 + 34) / 2 = 55/2 = 27.5

Median is 27.5.