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From MitDavidDv: Problem Solving Question- MGMAT CAT #2

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Joined: 28 Jan 2011
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From MitDavidDv: Problem Solving Question- MGMAT CAT #2 [#permalink] New post 11 Jun 2011, 21:16
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

67% (01:45) correct 33% (00:00) wrong based on 6 sessions
Level of Difficulty: 700-800

Six mobsters have arrived at the theater for the premiere of the film “Goodbuddies.” One of the mobsters, Frankie, is an informer, and he's afraid that another member of his crew, Joey, is on to him. Frankie, wanting to keep Joey in his sights, insists upon standing behind Joey in line at the concession stand, though not necessarily right behind him. How many ways can the six arrange themselves in line such that Frankie’s requirement is satisfied?
A. 6
B.24
C. 120
D. 360
E. 720
[Reveal] Spoiler: OA
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Re: From MitDavidDv: Problem Solving Question- MGMAT CAT #2 [#permalink] New post 11 Jun 2011, 21:29
This has been discussed earlier, so I'm posting two links :

permutation-combination-86147.html

http://www.manhattangmat.com/forums/six ... -t739.html

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Subhash
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Re: From MitDavidDv: Problem Solving Question- MGMAT CAT #2 [#permalink] New post 13 Jun 2011, 00:04
6 mobsters can stand in 6! ways = 720.

in half of the cases one person will be ahead and in the other person in the other half.

thus 360 cases.
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Re: From MitDavidDv: Problem Solving Question- MGMAT CAT #2   [#permalink] 13 Jun 2011, 00:04
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From MitDavidDv: Problem Solving Question- MGMAT CAT #2

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