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# AB/CD<0 IS BC>AD? 1) CD>AB 2) B<C<0

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Senior Manager
Joined: 02 Feb 2004
Posts: 344

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10 Apr 2005, 09:58
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AB/CD<0

1) CD>AB
2) B<C<0
Current Student
Joined: 28 Dec 2004
Posts: 3357
Location: New York City
Schools: Wharton'11 HBS'12

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10 Apr 2005, 10:49
C for me

we want to know if BC>AD

from statement 1)

we have CD>AB

but we dont know if C is negative or D is negative same thing with A and B .....Insuff

from statement 2)

we B<C<0

so we know B C are negative but we dont know if A or D is negative....Insuff

together lets see....

AB/CD<0
then the sign of either A or D must be negative.

from 1 we know that CD>AB
from 2 we know that B is negative. then A has to positive for 1 to be true!

C is sufficient...
VP
Joined: 18 Nov 2004
Posts: 1433

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10 Apr 2005, 10:57
"B"

state 1: insuff

state 2...we know (B/C)(A/D) < 0......if BC are both -ve as is the case in state 2.....then B/C is +ve.....for A/D or AD has to be -ve

so CB > AD...ans is YES....suff
Current Student
Joined: 28 Dec 2004
Posts: 3357
Location: New York City
Schools: Wharton'11 HBS'12

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10 Apr 2005, 11:11
yes b it is...

my bad...I totally am out of touch

I actually remember seeing this on my gmat CAT...I got it right then...I guess totally screwed up now...
10 Apr 2005, 11:11
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