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23 May 2020, 04:34
Kudos
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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:
15%
(low)
Question Stats:
74% (00:52) correct
26%
(00:50)
wrong
based on 298
sessions
History
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Not Attempted Yet
Is x – y ≥ 5 ?
(1) x ≥ 9
(2) y ≥ 4
DS21189
(1) x ≥ 9
(2) y ≥ 4
DS21189
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
23 May 2020, 05:34
Kudos
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We need information about both x and y, so the answer must be C or E. But even using both Statements, we don't have enough information. It might be true that x = 1,000,000 and y = 10, in which case x - y > 5. But it might be true that x = 10 and y = 1,000,000, in which case x - y is very negative, so x - y < 5. So the answer is E.
23 May 2020, 06:35
Kudos
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Bunuel
statement 1: x ≥ 9
no information about y.
let x=9, y=3; x-y=6; sufficient
let x=9, y=9; x-y=0; not sufficient
statement 2: y≥4
no information about x.
let x=9, y=4; x-y=5; sufficient
let x=9, y=9; x-y=0; not sufficient
combining two statement 1 and 2, we get
x≥9, y≥4; x can be equal to 9 or more than 9, y can be 4 or more than 4. it may be possible y>x as y=10, x=9 and hence not sufficient
still we take example as below to confirm the same.
let x=10, y=4; x-y=6; sufficient
let x=10, y=10; x-y=0; not sufficient
therefore E
