Back to HW 4: 5.5
Could someone help me out with this one?
Examine the situation as follows:
We must place the books we will choose
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Now we must place at least one book between each of these to separate them
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We have so far placed the five books we will choose, and four books to separate them. The remaining three books can either be placed next to the separating books, or on the outsides of the current model we have constructed. We now have six places to place three books. --User:mturczi
Would there not be more choices than that, because you can place the 3 remaining books in between any of the 9 books on the shelf? --User:jdrummon
