Step-by-step explanation:
Mean= The data points that add up, or, the sum of all data points, divided by the number of data points, will give you the answer,
So
20+50+30+40+60+80 would be
100+40+60+80 which is
200.
Since there are 6 numbers in the problem, we do
200/6
which will give us
33.33 etc. (33.3333333333 on and on forever)