=+2 The head of the enrolment advisers would like to increase the number of students seen each day, because at 300 students a day it would take 14 working days to see all of the students. This is a problem because the registration period lasts for only two weeks (10 working days). If the advisers could advise 420 students a day, it would take only two weeks (10 days). However, they want to make sure that the waiting time is not excessive. What would be the average waiting time if 420 students were seen each day?