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Problem with Kaplan's explanation on a concept! Please HELP

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by Pdgmat2010 » Wed Apr 21, 2010 8:33 am
I took the Kaplan CAT today.
one data sufficiency question has the following given condition

1. its given that (ab/cd) < 0.
a,b,c,d are numbers

2. its also given that cd > ab.

The CAT expln says that 'these 2 stmts indicate that cd is positive and ab is negative'.

Is this correct?

I am not convinced yet.

Could someone shed some light?

Its driving me nuts :)

Cheers,
Pd
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by rn4gmat » Wed Apr 21, 2010 8:38 am
As it is given that (ab/cd) < 0

Therefore both ab and cd cannot be negative but one of them has to be negative.

Also as it is given that cd > ab.

therefore we can derive that cd will be positive and ab is negative.

Hope this helps.
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