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Source: — Data Sufficiency |
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by liferocks » Thu May 20, 2010 9:52 pm
From 1
y can be 1 in two cases when n-=1 and x is anything or x=1 and n is anything...not sufficient

From 2
no information about y...not sufficient

combining
n can be -3,-1,1,3 any thing...if n=-1 ,for any value of x y will be 1...not sufficient

IMO ans is E
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