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13 Oct 2021, 08:00
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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:
45%
(medium)
Question Stats:
58% (01:26) correct
42%
(01:52)
wrong
based on 83
sessions
History
Date
Time
Result
Not Attempted Yet
13 Oct 2021, 08:21
Kudos
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Is xy > 0?
Do x and y have same sign?
(1) \(x - y = 2\)
x=4, y=2, answer is yes.
x=2, y=0, answer is no.
(2) \(\frac{x}{y}<1\)
If \(0<\frac{x}{y}<1\), answer is yes.
If \(\frac{x}{y}<0\), answer is no.
Combined
If x=1, y=-1, answer is no.
If x=-2, y=-4, answer is yes.
Insufficient
E
Do x and y have same sign?
(1) \(x - y = 2\)
x=4, y=2, answer is yes.
x=2, y=0, answer is no.
(2) \(\frac{x}{y}<1\)
If \(0<\frac{x}{y}<1\), answer is yes.
If \(\frac{x}{y}<0\), answer is no.
Combined
If x=1, y=-1, answer is no.
If x=-2, y=-4, answer is yes.
Insufficient
E
13 Oct 2021, 08:58
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chetan2u
But by combining the 2 statements we have statements, x-y = 2 & x<y.
And your combined case states x>y (If x=1, y=-1, answer is no), which is incorrect.
If x<y, then either x & y both will be +ve or both will be -ve, i which case we have a sufficient answer to the question.
So I think correct answer is C.
