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Data Sufficiency .

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by cans » Tue Sep 20, 2011 3:12 am
(a/b) (c/d) > c/b?
or (a/d)(c/b) > c/b
as c,b are positive,
thus a/d>1 or a>d???
c>b. insufficient
a>d sufficient
IMO B
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by 786 » Tue Sep 20, 2011 3:36 am
Ah , i see .

cool . Thanks a lot Cans !!
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by saketk » Tue Sep 20, 2011 8:42 pm
786 wrote:If a, b, c, and d are positive integers, is (a/b) (c/d) > c/b?
(1) c > b
(2) a > d
Statement 1: c/b>1

LHS = ac/bd

or, (a/d)(c/b) -- no info about a/d.. hence, statement 1 is NS

statement B says a/d>1 .. say for example 2

2*C/b will always be greater than c/b

Hence, statement 2 is sufficient.

Correct answer - B
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