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23 May 2020, 05:38
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
85% (00:56) correct
15%
(01:03)
wrong
based on 180
sessions
History
Date
Time
Result
Not Attempted Yet
23 May 2020, 05:43
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Bunuel
Is xy > 0 ?
(1) x = y + 6
(2) y < 0
PS21194
(1) x = y + 6
(2) y < 0
PS21194
Question: Is xy > 0?
Question REPHRASED: DO X AND Y HAVE SAME SIGNS ?
Statement 1: x = y + 6
Case 1: at y = -1, x = 5 i.e. xy < 0
Case 2: at y = +1, x = 7 i.e. xy > 0
NOT SUFFICIENT
Statement 2:y < 0
No relation of y with x is given yet therefore we are inconclusive about sign of x hence
NOT SUFFICIENT
COmbining the statements
y < 0 and x = y + 6
Case 1: at y = -1, x = 7 i.e. xy < 0
Case 2: at y = -10, x = -4 i.e. xy > 0
NOT SUFFICIENT
Answer: Option E
Siak0730
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23 May 2020, 05:48
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Is xy > 0 ?
(1) x = y + 6
(2) y < 0
xy>0 ==> (x>0, y>0); (x<0, y<0) == to find
1. x= y+6
take y=1, we get x=7 ==> x>0, y>0 : sufficient
take y=-1, we get x=5 ==> x>0, y<0 : not sufficient
therefore, not A
2. y<0
no information about x
if x>0 : not sufficient (as x>0, y<0)
if x<0 : sufficient (as x<0, y<0)
therefore, not B
obviously, not D
we have to choose from from C and E
combining 1 and 2, we have
y<0 and x=y+6
take y=-10, we get x=-4; x<0, y<0 : sufficient
take y=-1, we get x=5; x>0, y<0 : not sufficient
therefore, E
(1) x = y + 6
(2) y < 0
xy>0 ==> (x>0, y>0); (x<0, y<0) == to find
1. x= y+6
take y=1, we get x=7 ==> x>0, y>0 : sufficient
take y=-1, we get x=5 ==> x>0, y<0 : not sufficient
therefore, not A
2. y<0
no information about x
if x>0 : not sufficient (as x>0, y<0)
if x<0 : sufficient (as x<0, y<0)
therefore, not B
obviously, not D
we have to choose from from C and E
combining 1 and 2, we have
y<0 and x=y+6
take y=-10, we get x=-4; x<0, y<0 : sufficient
take y=-1, we get x=5; x>0, y<0 : not sufficient
therefore, E
