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12 Feb 2012, 12:18
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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:
35%
(medium)
Question Stats:
59% (00:59) correct
41%
(00:53)
wrong
based on 266
sessions
History
Date
Time
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Not Attempted Yet
Is x < y ?
(1) The ratio of x to y is 7/9.
(2) xy>0
(1) The ratio of x to y is 7/9.
(2) xy>0
OA is E.
My question is, if x and y are both negative then wont the minus signs cancel out? If this holds true then, the ratio will always be positive and statement (1) will be sufficient.
Anyone?? Thanks in advance.
My question is, if x and y are both negative then wont the minus signs cancel out? If this holds true then, the ratio will always be positive and statement (1) will be sufficient.
Anyone?? Thanks in advance.
12 Feb 2012, 12:41
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Is x < y ?
(1) The ratio of x to y is 7/9 --> if x=7 and y=9 then x<y and the answer to the question is YES, but if x=-7 and y=-9 then x>y and the answer to the question is NO. Not sufficient.
Notice that in both cases x/y=7/9, but in first case x<y and in second case x>y.
(2) xy>0 --> x and y have the same sign. Not sufficient to answer whether x<y.
(1)+(2) Example from (1) is still valid. Not sufficient.
Answer: E.
Hope it's clear.
(1) The ratio of x to y is 7/9 --> if x=7 and y=9 then x<y and the answer to the question is YES, but if x=-7 and y=-9 then x>y and the answer to the question is NO. Not sufficient.
Notice that in both cases x/y=7/9, but in first case x<y and in second case x>y.
(2) xy>0 --> x and y have the same sign. Not sufficient to answer whether x<y.
(1)+(2) Example from (1) is still valid. Not sufficient.
Answer: E.
Hope it's clear.
15 Feb 2012, 10:47
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Thank you Bunuel for your reply. I have understood your explanation.
But I am still confused about 1 thing. If the ratio of x and y = say -1/-2 then, will u not cancel out the negative signs to make the ratio positive before determining the values of x and y? In other words can the ratio of x and y remain -1/-2 and not 1/2 (by cancelling out the negative signs)...
hope you have understood my query. Any comments will be helpful. Thanks in advance.
But I am still confused about 1 thing. If the ratio of x and y = say -1/-2 then, will u not cancel out the negative signs to make the ratio positive before determining the values of x and y? In other words can the ratio of x and y remain -1/-2 and not 1/2 (by cancelling out the negative signs)...
hope you have understood my query. Any comments will be helpful. Thanks in advance.
