Note: Due to computer problems, I had to hand-write all of the problems during the live review. I short-handed some of them, so I recommend printing out a blank copy of the problems to go with these solutions.

We had some technical difficulties Monday night, so I simply scanned my notes. However, since my notes are double-sided, the pages scanned out of order. In this .pdf file, the pages are in the order 1, 3, 5, 2, 4, 6.

Correction from the live review: At the live review, I originally worked problem #10 as if it had asked for a probability. The problem, as I originally wrote it, actually asked for the number of ways (NOT the probability) the event could happen. On the answer key, you will find that I have changed the question to ask, "What is the probability that these 6 people exit the elevator with at least 2 people exiting on the same floor?" Changing the question then makes the work shown below it correct.