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

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Manager
Joined: 25 Mar 2008
Posts: 105
if X>1 and Y>1 is X<y? 1)x^2/(xy+X)<1 [#permalink]

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27 Sep 2008, 12:37
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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
Joined: 22 Sep 2008
Posts: 122

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30 Sep 2008, 03:44
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, 03:44
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