Permutation problem

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Pinku: Junior | Next Rank: 30 Posts; Posts: 17; Joined: Thu Jul 22, 2010 3:15 pm

by Pinku » Thu Jul 22, 2010 9:51 pm

In how many ways, 7 gents and 4 ladies can be arranged circularly in a meeting

Source: Beat The GMAT — Problem Solving | Thu Jul 22, 2010 9:51 pm

selango: Legendary Member; Posts: 1460; Joined: Tue Dec 29, 2009 1:28 am; Thanked: 135 times; Followed by:7 members

by selango » Thu Jul 22, 2010 9:56 pm

Number of ways of arranging n people in a circular arrangment is (n-1)!

10! ways

--Anand--

singhpreet1: Senior | Next Rank: 100 Posts; Posts: 95; Joined: Tue Jun 08, 2010 11:27 am; Thanked: 7 times

by singhpreet1 » Thu Jul 22, 2010 10:06 pm

Pinku wrote:In how many ways, 7 gents and 4 ladies can be arranged circularly in a meeting

formula for circular probability is: (n-1)! ,n is 11, therefore total probabilities are (11-1!)= 10!

Preet

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