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Source: — Data Sufficiency |
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by kajcha » Mon Sep 17, 2007 10:35 am
Stmt 1 - (1-x)(1-y) = 1 can be written as

1-x-y+xy=1 => xy = x+y SUFF

Stmt 2 - can be written as
(x+y)(x-y) = xy(x-y) => x+y = xy SUFF

ANS D
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by magical cook » Mon Sep 17, 2007 12:30 pm
OA is D. :)
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