If I have 5 different boxes, lets give them a letter A, B, C, D, E and I have to stack them. How many different ways are there to stack them. If I have to use them all it would be 5!, however if I do not have to use them all for a stacking. So A is a solution, B is a solution, etc.
Now to add to this question, if a stacking of AB is the same as stacking as BA what would be the total number of stacking possible?
Hope this is clear. Hope you can help! Thank you :)
I know that for 2 boxes, A and B the result would be: A, B, AB (AB=BA) I know that for 3 boxes, A, B and C the result would be: A, B, C, AB, AC, BC, ABC
Now I don't know how to continue.....