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pankaj
 Post subject: Circular Permutation
PostPosted: Thu, 9 Sep 2010 16:33:36 UTC 
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Joined: Tue, 13 Jun 2006 11:57:53 UTC
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Location: new delhi
Consider ridentical objects of type 1 and n-r identical objects of type 2 which are to be arranged on the circumference of a circle.

In how many ways can this be done?
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Denis
 Post subject:
PostPosted: Thu, 9 Sep 2010 17:27:26 UTC 
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What is YOUR answer to n=3,r=2? To n=4,r=1?

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pankaj
 Post subject:
PostPosted: Fri, 10 Sep 2010 02:08:04 UTC 
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For n=3 and r=2,the answer should be 1
For n=4 and r=1,the answer is again 1,but for n=4 and r=2 the answer would be 2.
Is there a pattern which I am not able to see
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