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Source: — Data Sufficiency |
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by mehravikas » Sat Jun 06, 2009 8:32 pm
We don't know whether x and y and positive or negative.

take y = -1 and 1

statement 1 - is insufficient because

(-1)^2 - 1/1 > 1 - false
(1)^2 + 1/1 > 1 - true

statement 2 is insufficient because it gives no info about x

combine the statement and you can use only positive hence answer 'C'
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by nervesofsteel » Sat Jun 06, 2009 11:55 pm
mehravikas wrote:We don't know whether x and y and positive or negative.

take y = -1 and 1

statement 1 - is insufficient because

(-1)^2 - 1/1 > 1 - false
(1)^2 + 1/1 > 1 - true

statement 2 is insufficient because it gives no info about x

combine the statement and you can use only positive hence answer 'C'
Hi Vikas ,

If we are taking y = -1 in A then shouldn't it be

(-1)^2 - 1/1 > -1 ..?? which is true..

Please explain...
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by mehravikas » Sun Jun 07, 2009 4:58 pm
Sorry it was my mistake, pick fractional values for y. i.e. -1/3, 1/3

you should get the answer.
nervesofsteel wrote:
mehravikas wrote:We don't know whether x and y and positive or negative.

take y = -1 and 1

statement 1 - is insufficient because

(-1)^2 - 1/1 > 1 - false
(1)^2 + 1/1 > 1 - true

statement 2 is insufficient because it gives no info about x

combine the statement and you can use only positive hence answer 'C'
Hi Vikas ,

If we are taking y = -1 in A then shouldn't it be

(-1)^2 - 1/1 > -1 ..?? which is true..

Please explain...
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