The Pack-U-Up Moving Company uses several different size boxes,but the boxes all have the same meaurements on the top andbottom so they'll stack neatly on top of one another.The only differences between the boxes is their heights: some are three feet high, some are two feet high, and some are one foot high. If the moving company made stacks three boxes high, how many different stacks could be made?

Note that this stack of boxes on the left...

3 is the same as 3 the stack of
3 2 boxes on the right
2 3

2 answers

Just different heights? Or are orders of stacking important?

We do not have a clear indication of what "this stack of boxes" is.

Review your information on combinations and permutations.
A stack of books is
63
inches high. How high is it in feet and inches?