There are 8 pens along a wall in the pound.  The pound has to allocate 4 pens to dogs, 3 to cats, and one to roosters.  In how many ways can the pound make the allocation?
Question:
There are 8 pens along a wall in the pound.  The pound has to allocate 4 pens to dogs, 3 to cats, and one to roosters.  In how many ways can the pound make the allocation?
Answer:
Let's think step by step.

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There are 8 pens along a wall in the pound.  The pound has to allocate 4 pens to dogs, 3 to cats, and one to roosters.  In how many ways can the pound make the allocation?
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