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07 Feb 2012, 16:23
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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:
55%
(hard)
Question Stats:
61% (01:44) correct
39%
(01:43)
wrong
based on 198
sessions
History
Date
Time
Result
Not Attempted Yet
07 Feb 2012, 16:30
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Is x = 0?
(1) x^2 y = x^3 y --> x^2y(x-1)=0 --> x=0, y=0 or x=1. Not sufficient.
(2) x^2 / y= x^3 y --> x^2(xy-1/y) --> x=0 or xy^2=1. Not sufficient.
(1)+(2) It's possible that x=0 but it's also possible that x=1 (and y=1 for example). Not sufficient.
Answer: E.
(1) x^2 y = x^3 y --> x^2y(x-1)=0 --> x=0, y=0 or x=1. Not sufficient.
(2) x^2 / y= x^3 y --> x^2(xy-1/y) --> x=0 or xy^2=1. Not sufficient.
(1)+(2) It's possible that x=0 but it's also possible that x=1 (and y=1 for example). Not sufficient.
Answer: E.
24 May 2017, 15:36
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rxs0005
Statement 1 is simply statement crossed multiplied; statement 2 gives us the possibility of 1 for X but also the possibility of 0 since y is constant. Therefore, because statement 2 is statement 1 and statement 2 is insufficient statement is insufficient.
Hence
"E"
