If four cats and five mice enter a race

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Discussion Overview

The discussion revolves around a combinatorial problem involving a race with four cats and five mice, specifically focusing on how many ways the mice can occupy the first three positions. The scope includes mathematical reasoning and exploratory problem-solving.

Discussion Character

  • Mathematical reasoning, Exploratory

Main Points Raised

  • One participant suggests using the permutation formula P(9, 5) but expresses uncertainty about its correctness.
  • Another participant proposes that the answer could be 6! = 720, but also questions their own reasoning.
  • A different participant calculates the number of ways as 5*4*3*6!, explaining that the first three positions can only be filled by the mice, with decreasing choices for each subsequent position.
  • One participant raises a question about whether the mice are distinguishable, indicating that this factor would affect the final answer.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the correct approach or answer, with multiple competing views and uncertainties expressed throughout the discussion.

Contextual Notes

The discussion does not clarify whether the mice are distinguishable or not, which is a key assumption that could influence the calculations. Additionally, there are unresolved mathematical steps regarding the proposed solutions.

Caldus
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If four cats and five mice enter a race, how many ways can they finish with a mouse placing first, second, and third?

I was about to say that the answer would be P 9, 5 but not sure...
 
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Seems to me like the answer would be 6! = 720. But I might be talking out of my ass.
 
Last edited:
5*4*3*6!

In first place, there are only 5 choices, one of the mice. In second place, there are only 4, since one of the mice is already chosen. In third, there're 3 choices. In the remaining, all choices are open.

cookiemonster

Edit: Noticed a weird word in there that didn't belong.
 
Last edited:
are the mice distinguishable...? it will influence the answer.
 

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