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# 6 persons seat themselves at round table. What is the

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Manager
Joined: 27 Jul 2003
Posts: 122

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Location: Singapore
6 persons seat themselves at round table. What is the [#permalink]

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09 Oct 2003, 21:41
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6 persons seat themselves at round table. What is the probability that 2 given persons are adjacent?

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CEO
Joined: 15 Aug 2003
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10 Oct 2003, 00:48
araspai wrote:
6 persons seat themselves at round table. What is the probability that 2 given persons are adjacent?

If two persons are adjacent, # of ways ... 4! * 2

Total ways = 5!

prob = 4! *2 /5!

thanks
praetorian

Last edited by Praetorian on 10 Oct 2003, 00:50, edited 1 time in total.

Kudos [?]: 904 [0], given: 781

SVP
Joined: 03 Feb 2003
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13 Oct 2003, 23:36
agree
total combinations = 5!

P=2!*4!/5!=2/5

Last edited by stolyar on 15 Oct 2003, 23:02, edited 1 time in total.

Kudos [?]: 299 [0], given: 0

13 Oct 2003, 23:36
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