Answer:

And from the problem we know the following:
represent the condition if the route is approved
represent the condition if the route is NOT approved
Then replacing in the formula for the expected value we got:

So then the expected number of new employees to be hired by the airline based on the conditions given is between 395 and 396.
Explanation:
For this cae we can define the random variable X who represent the number of new employees to be hired by the airline and we can find the expected value with the following general formula:

And from the problem we know the following:
represent the condition if the route is approved
represent the condition if the route is NOT approved
Then replacing in the formula for the expected value we got:

So then the expected number of new employees to be hired by the airline based on the conditions given is between 395 and 396.