we have the data set
50 60 80
90 50 70
40 50 80
step 1
Rewrite the given data set from least to the greatest value
so
40 50 50 50 60 70 80 80 90
Remember that
The median is the center of the data set
therefore
40 50 50 50 60 70 80 80 90
The median is 60