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PS-2

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Current Student
Joined: 28 Dec 2004
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PS-2 [#permalink]

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22 Oct 2005, 19:28
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Director
Joined: 21 Aug 2005
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22 Oct 2005, 19:32
It should be any of these -> 5, -10, 2.5
5 is not in the list. So we have 2 numbers that are in the list.
Probability = 2/12 = 1/6
Current Student
Joined: 28 Dec 2004
Posts: 3384
Location: New York City
Schools: Wharton'11 HBS'12
Followers: 15

Kudos [?]: 282 [0], given: 2

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22 Oct 2005, 19:43

I just solved half the problems I got wrong...

as they say the exam is 90% mind set....
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Joined: 13 Jun 2004
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22 Oct 2005, 20:20
yep same as Gsr

solution are 5, -10 and 5/2

5 is not in the set, however -10 and 5/2 are

there 12 numbers in the set so you have 2/12 = 1/6 chances to get them
22 Oct 2005, 20:20
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