I don’t know , why don’t you tell me why they were selected
28.7083333333...
But you could also round it up to 29.
Answer:
the mean = 9, and the mean deviation = 3.75
Hope this helps! :)
Solution:
we have been asked to find
The expression is equivalent to 
we can simplify the given expression as below

Hence the simplified expression , equaivalent to the given expression is 1/2.