Answer:
No employees or 8 employees judging co-workers based on the cleanliness of their desk would be considered unusual outcomes.
Explanation:
Binomial probability distribution
Probability of exactly x sucesses on n repeated trials, with p probability.
The expected value of the binomial distribution is:

The standard deviation of the binomial distribution is:

Outcomes are unusual when they are more than 2.5 standard deviations of the mean.
In this problem, we have that:

So




No employees or 8 employees judging co-workers based on the cleanliness of their desk would be considered unusual outcomes.