It's a triangle with one vertex at (0,0) and other side at the top, like this
<h2>V</h2>
Answer: $391.08 would be how much he really has in his register. I may be a little off though.
Probability of an event happening is given by:
probability of an event happening=number of ways it can happen/total number of outcomes
number of random selection=40
total number of patients who did not leave against medical advice=52,560
thus the probability that at random selection none of the 40 patients left the treatment center against medical advice will be:
40/52560
=0.00076
