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Data Sufficiency Kaplan..

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by mjjking » Mon Sep 29, 2008 2:04 am
So... b is not 0. And a>b... a>c?
number 1. tells us that a/b > c/b ... but if a>b and hence a/b>1 it means that also a/c>1 hence a>c.
number 2 says that 5ab>6bc which can be written as 5a > 6c. This means that a>c.

hence both answers alone are sufficient.
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by Gmatterz » Mon Sep 29, 2008 2:40 am
The OA is E...Really confused...
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by Ian Stewart » Mon Sep 29, 2008 5:11 am
When analysing the statements, be sure to consider the possibility that b is negative. For example, when considering the first statement:

a/b > c/b

If b > 0, we can multiply both sides by b to find:

If b > 0, then a > c

However, if b is negative, when we multiply both sides by b, we need to reverse the inequality:

If b < 0, then a < c

The analysis is similar for the second statement.
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Thanks

by Gmatterz » Mon Sep 29, 2008 9:08 am
Hi Ian ,
Thanks a Million for clearing my confusion.Its crystal clear now why the anwser would be E.

Thanks
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