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10 Oct 2019, 23:15
Kudos
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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:
15%
(low)
Question Stats:
78% (00:37) correct
22%
(01:17)
wrong
based on 99
sessions
History
Date
Time
Result
Not Attempted Yet
siddharthkapoor
GMAT Club Reviews PM Intern
Joined: 10 Apr 2018
Last visit: 12 Sep 2025
Posts: 527
Own Kudos:
Given Kudos: 522
Location: India
Schools: ISB'22 (D)
GMAT 1: 680 Q48 V34
GPA: 3.3
Products:
11 Oct 2019, 12:20
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To find the value of 2x-y, we need values of x and y.
(1) From this statement, we can't find values of x and y.
Thus, insufficient.
(2) From this statement, we can't find values of x and y.
Thus, insufficient.
From (1) and (2) together, we can find the values of x and y by simultaneously solving the two equations.
Thus, sufficient.
Therefore, the answer is option C.
(1) From this statement, we can't find values of x and y.
Thus, insufficient.
(2) From this statement, we can't find values of x and y.
Thus, insufficient.
From (1) and (2) together, we can find the values of x and y by simultaneously solving the two equations.
Thus, sufficient.
Therefore, the answer is option C.
11 Oct 2019, 15:54
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Bunuel
Analyzing the question:
To get sufficiency, either need to solve for x & y or 2x-y. For example x - 0.5y = 1 or 2x = y + 2 would be sufficient.
Statement 1: Insufficient. Cannot solve for x & y nor can you modify the equation to get 2x-y on one side.
Statement 2: Insufficient. Similar to above.
Combined: If you have a system of two linearly independent equations and two variables, you can solve for both variables.
Ans: C
