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PS - equality problem - please help

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madsport: Senior | Next Rank: 100 Posts; Posts: 46; Joined: Mon Aug 25, 2008 9:06 am; Thanked: 1 times

by madsport » Sun Sep 07, 2008 9:15 am

The answer is C

I do not understand why the answer is not D Can someone please explain why?

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Source: Beat The GMAT — Problem Solving | Sun Sep 07, 2008 9:15 am

ashishjha100: Junior | Next Rank: 30 Posts; Posts: 24; Joined: Tue Apr 08, 2008 8:51 am; Thanked: 2 times

by ashishjha100 » Sun Sep 07, 2008 5:02 pm

Consider the first part of inequality

0 < 1 - c/d ==> c/d <1

Consider the second part of inequality

1 - c/d <1 ==> -c/d < 0 ==> c>0

So ans C

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