probability office building : PS Archive
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# probability office building

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Intern
Joined: 02 Jun 2009
Posts: 25
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Kudos [?]: 8 [0], given: 0

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02 Jun 2009, 02:49
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A certain company assigns employees to offices in such a way that some of the offices can be empty and more than one employee can be assigned to an office. In how many ways can the company assign 3 employees to 2 different offices?
A. 5
B. 6
C. 7
D. 8
E. 9
Intern
Joined: 04 Jun 2009
Posts: 3
Followers: 0

Kudos [?]: 0 [0], given: 2

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04 Jun 2009, 08:08
9:
office [#1,#2]: [0,3], [1,2] - [a bc], [b ac], [c ab], [2,1] x3, [3,0]

oops - yes 8..

Last edited by osnat on 06 Jun 2009, 06:01, edited 1 time in total.
Senior Manager
Joined: 16 Jan 2009
Posts: 359
Concentration: Technology, Marketing
GMAT 1: 700 Q50 V34
GPA: 3
WE: Sales (Telecommunications)
Followers: 4

Kudos [?]: 199 [0], given: 16

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04 Jun 2009, 10:06
IMO D

3C0+3C1+3C2+3C3
=1+3+3+1
=8
_________________

Lahoosaher

Re: probability office building   [#permalink] 04 Jun 2009, 10:06
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