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if X>1 and Y>1 is X<y? 1)x^2/(xy+X)<1

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Manager
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if X>1 and Y>1 is X<y? 1)x^2/(xy+X)<1 [#permalink] New post 27 Sep 2008, 11:37
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A
B
C
D
E

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0% (00:00) correct 0% (00:00) wrong based on 0 sessions
if X>1 and Y>1 is X<y?
1)x^2/(xy+X)<1
2)XY/(y^2-Y)<1

ans is E
pls explain

at a fruit stand yesterday, the price of each Apple is $0.10 more than the price of each orange. what was the total revenue from the sale of oranges at the fruit stand yesterday?

1) the number of oranger sold at the fruit stand yesterday was 5 more than the number of apples.
2)the total revenue from sale of apples at the fruit stand yesterday was $15

ans is: C
pls explain
Manager
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Re: DS [#permalink] New post 30 Sep 2008, 02:44
Question 1:
X = 2 y = 3 => 4 / 6+2 < 1
X= 3 y = 2.5 => 9 / 7.5 + 3
So A is not sufficient

X y/(y^2-y) < 1 => x / y-1 < 1 => x <y-1 , so obviously y > x
B is sufficient.
Re: DS   [#permalink] 30 Sep 2008, 02:44
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