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# If there are 12 desks in the front row of a classroom, in

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Manager
Joined: 28 Aug 2004
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If there are 12 desks in the front row of a classroom, in [#permalink]  04 Jun 2005, 21:39
If there are 12 desks in the front row of a classroom, in how many ways can 3 students be seated next to each other?
Manager
Joined: 28 Aug 2004
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sparky, why (12-2)?
Director
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Dan wrote:
sparky, why (12-2)?

3 students take 3 adjacent desks. sit them on one side and then move towards the other, taking one more seat at a time, you will need 9 moves, plus 1 that accounts for the original location, that makes it 10 or 12-2.
Manager
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oh yes yes. Was doing it for 10 instead of 12 seats under the 2 minutes pressure to conform!

thanks..
Director
Joined: 18 Apr 2005
Posts: 549
Location: Canuckland
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Kudos [?]: 8 [0], given: 0

Dan wrote:
oh yes yes. Was doing it for 10 instead of 12 seats under the 2 minutes pressure to conform!

thanks..

Most of the problems here are GMAT tough, so even if you take 3 min, it won't hurt you.
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