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11 Jul 2019, 23:58
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D
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:
85% (00:37) correct
15%
(00:54)
wrong
based on 48
sessions
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Not Attempted Yet
WiziusCareers1
Joined: 27 Apr 2009
Last visit: 15 Dec 2024
Posts: 116
Own Kudos:
Given Kudos: 35
Status:Not Applying
Location: India
Schools: HBS '14 (A)
GMAT 1: 730 Q51 V36
12 Jul 2019, 00:49
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x + y + z = 6 and y = 1
=> x + z = 5
Considering statement (1) alone:
x - z = 1
Two equation, two variables.
SUFFICIENT
Considering statement (2) alone:
z = 2
=> x = 3
SUFFICIENT
The answer is (D).
=> x + z = 5
Considering statement (1) alone:
x - z = 1
Two equation, two variables.
SUFFICIENT
Considering statement (2) alone:
z = 2
=> x = 3
SUFFICIENT
The answer is (D).
12 Jul 2019, 04:17
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Quote:
If x + y + z = 6 and y = 1, then what is x?
(1) x – z = 1
(2) z = 2
(1) x – z = 1
(2) z = 2
Given:
X+Y+Z=6 and Y=1
STATEMENT 1: X-Z=1==> X=Z+1
SUBSTITUTE IN THE ORIGINAL EQUATION:
Z+1+1+Z=6===> 2Z+2=6 ===> Z=2
SUBSTITUTE AGAIN IN THE ORIGINAL EQAUTION
X+1+2=6 ===> X=3 SO STATEMENT 1 IS SUFFICIENT
STATEMENT 2: Z=2 ==> SUBSTITUTE IN THE ORIGINAL EQUATION: X+1+2=6 ===> X=3 SO STATEMENT 2 IS SUFFICIENT
THE ANSWER IS (D)
