Line 18: Line 18:
  
 
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]]
 
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]]
 +
 +
I'm not sure what I am to do with this problem.. Is it something similar to the arranging women and men, and two men cannot be arranged in a row...?

Revision as of 00:45, 12 February 2009

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

| | | | |

Now we must place at least one book between each of these to separate them

|*|*|*|*|

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

I'm not sure what I am to do with this problem.. Is it something similar to the arranging women and men, and two men cannot be arranged in a row...?

Alumni Liaison

Have a piece of advice for Purdue students? Share it through Rhea!

Alumni Liaison