Answer:
The sample space is:

Step-by-step explanation:
The sample space of an experiment is a set of all the possible values that satisfies that experiment.
The five supervisors are A, B, C, D and E.
Two are to selected.
The number of ways to select 2 supervisors from 5 is: 
The sample space will consist of 10 combinations.
The sample space is:

3.4
5.14
______
8.54
If we round the answer
We get 8.5
Guess I gave you the correct answer
I think you guys are using a^2 + b^2 = c^2
the equation would be
x^2 + 2x^2 = 6^2