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Darden2010
Joined: 30 Mar 2007
Last visit: 22 Jul 2020
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Schools: Darden '15
GMAT Date: 12-07-2011
Updated on: 24 Jun 2008, 10:38
Originally posted by Darden2010 on 29 Oct 2007, 18:37.
Last edited by Darden2010 on 24 Jun 2008, 10:38, edited 1 time in total.
Last edited by Darden2010 on 24 Jun 2008, 10:38, edited 1 time in total.
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29 Oct 2007, 18:55
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(4/7)*(1/6) = 4/42 (choosing a person that has only 1 friend out of seven and choosing his friend out of 6)
(3/7)*(2/6) = 6/42 (choosing a person that has 2 friends out of seven and choosing his friend , he has two, out of 6)
4/42+6/42 = 10/42 = 5/21
but we need 1-(5/21) = 16/21
the answer is (E)
(3/7)*(2/6) = 6/42 (choosing a person that has 2 friends out of seven and choosing his friend , he has two, out of 6)
4/42+6/42 = 10/42 = 5/21
but we need 1-(5/21) = 16/21
the answer is (E)
