"Find a set that is in correspondence with the collection of all possible handshakes that can occur in a group of five people." Even though this question doesn't mention whether or not you care about remembering who initiated the handshake, do we still need to take that into consideration?
martha2A: Jan. 15, 2015, 3:18 p.m.
I would assume that it is asking to answer the question in correspondence to the way five people can shake hands if we don't care to remember who initiates since it didn't specify.
weisbart: Jan. 15, 2015, 5:32 p.m.
right, we don't care who initiates.