Answer the attachment with an answer, and tell me how to do it for brainliest, and 75 points.

1) find the mean,
               20+10+30+20+50+30+40+20/8= 27.5
2) Find the distance of each value from that mean
               20- 7.5
               10- 17.5
               30- 2.5
               20-7.5
               50- 22.5
               30- 2.5
               40- 12.5
               20- 7.5
3) Find the mean of those distances
               7.5+17.5+2.5+7.5+22.5+2.5+12.5+7.5/8=10

The Mean absolute deviation for this data set is 10.