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11 Nov 2017, 09:42
Kudos
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B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
74% (01:09) correct
26%
(01:31)
wrong
based on 90
sessions
History
Date
Time
Result
Not Attempted Yet
If xy ≠ 0, what is the value of 1/x + 1/y ?
(1) 1/(x + y) = -1
(2) xy=6(x+y)
(1) 1/(x + y) = -1
(2) xy=6(x+y)
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
11 Nov 2017, 09:47
Kudos
Bookmarks
B
The question can be rephrased as (x+y)/xy=?
1: we can conclude x+y=-1. Insufficient
2: we can rearrange to give (x+y)/xy=1/6. Sufficient
Sent from my iPhone using GMAT Club Forum
The question can be rephrased as (x+y)/xy=?
1: we can conclude x+y=-1. Insufficient
2: we can rearrange to give (x+y)/xy=1/6. Sufficient
Sent from my iPhone using GMAT Club Forum
11 Nov 2017, 10:27
Kudos
Bookmarks
If xy ≠ 0, what is the value of 1/x + 1/y ?
(1) 1/(x + y) = -1
1/(x+y)=-1
=>1=-x-y
=>x+y = -1 (no enough information)
=> Insufficient
(2) xy=6(x+y)
1/x+1/y=(x+y)/xy
xy=6(x+y)
xy/(x+y)=6
=> sufficient
=> answer is B
(1) 1/(x + y) = -1
1/(x+y)=-1
=>1=-x-y
=>x+y = -1 (no enough information)
=> Insufficient
(2) xy=6(x+y)
1/x+1/y=(x+y)/xy
xy=6(x+y)
xy/(x+y)=6
=> sufficient
=> answer is B
