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# Is xy<1? (I) x + y = 1 (II) x^2 + y^2 = 1

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SVP
Joined: 29 Aug 2007
Posts: 2420
Is xy<1? (I) x + y = 1 (II) x^2 + y^2 = 1  [#permalink]

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11 Dec 2008, 15:44
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Is xy<1?

(I) x + y = 1
(II) x^2 + y^2 = 1

--== Message from GMAT Club Team ==--

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Senior Manager
Joined: 21 Apr 2008
Posts: 265
Location: Motortown
Re: DS: is xy<1  [#permalink]

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11 Dec 2008, 16:59
B

stmt1: Not Suff
stmt2: x^2 + y^2 = 1

x and y are either 0 and 1(viceversa) or fractions < 1 - Suff
Intern
Joined: 29 Jul 2008
Posts: 26
Re: DS: is xy<1  [#permalink]

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11 Dec 2008, 17:16
GMAT TIGER wrote:
Is xy<1?

(I) x + y = 1
(II) x^2 + y^2 = 1
Is xy<1?

(I) x + y = 1
(II) x^2 + y^2 = 1

Stmt 1 : suff
Assume x = -2, y = 3, xy < 1
else assume x= 0, y = 1, xy <1
else fraction xy will be less than 1

Stmt 2 : suff

IMO D
Senior Manager
Joined: 21 Apr 2008
Posts: 265
Location: Motortown
Re: DS: is xy<1  [#permalink]

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11 Dec 2008, 17:31
Oops

agree with rprabhu2001, answer has to be D
SVP
Joined: 29 Aug 2007
Posts: 2420
Re: DS: is xy<1  [#permalink]

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12 Dec 2008, 09:05
OA is D.

Thanks everybody.

GMAT TIGER wrote:
Is xy<1?

(I) x + y = 1
(II) x^2 + y^2 = 1

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________

Gmat: http://gmatclub.com/forum/everything-you-need-to-prepare-for-the-gmat-revised-77983.html

GT

Re: DS: is xy<1 &nbs [#permalink] 12 Dec 2008, 09:05
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