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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
75%
(hard)
Question Stats:
50% (01:47) correct
50%
(01:37)
wrong
based on 523
sessions
History
Date
Time
Result
Not Attempted Yet
31 Oct 2009, 15:01
Kudos
Bookmarks
(1) 9x=4y
Restating statement, we receive x=4/9y,
4/9y<y, while y>0, and
4/9y>y, while y<0. While we cannot determine sign of x or y, (1) alone is NOT SUFFICIENT.
(2) x=-y
x>y for all x>0, and
x<y for all x<0. But again sign of x or y is not known. So, (2) alone is NOT SUFFICIENT.
Both statements together could be true only if x=y=0.
Answer should be C.
KUDOS if you find it helpful
Restating statement, we receive x=4/9y,
4/9y<y, while y>0, and
4/9y>y, while y<0. While we cannot determine sign of x or y, (1) alone is NOT SUFFICIENT.
(2) x=-y
x>y for all x>0, and
x<y for all x<0. But again sign of x or y is not known. So, (2) alone is NOT SUFFICIENT.
Both statements together could be true only if x=y=0.
Answer should be C.
KUDOS if you find it helpful
General Discussion
31 Oct 2009, 15:04
Kudos
Bookmarks
Statement 1: 9x = 4y
x = (4/9)y
Therefore,
If y < 0: x > y
If y > 0: x < y
If y = 0: x = y
Insufficient.
Statement 2: x = -y
If y < 0: x > y
If y > 0: x < y
If y = 0: x = y
Insufficient.
Both Statements Together
(1) 9x = 4y
(2) x = -y
It should be apparent that this is only true iff x = y = 0. Therefore, sufficient!
The answer is C.
x = (4/9)y
Therefore,
If y < 0: x > y
If y > 0: x < y
If y = 0: x = y
Insufficient.
Statement 2: x = -y
If y < 0: x > y
If y > 0: x < y
If y = 0: x = y
Insufficient.
Both Statements Together
(1) 9x = 4y
(2) x = -y
It should be apparent that this is only true iff x = y = 0. Therefore, sufficient!
The answer is C.
