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09 Mar 2022, 05:30
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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:
25%
(medium)
Question Stats:
74% (00:47) correct
26%
(00:35)
wrong
based on 61
sessions
History
Date
Time
Result
Not Attempted Yet
09 Mar 2022, 05:55
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\(\frac{AD}{BCE}\\
\)
Statement 1: Insufficient
X and Y can have multiple values.
X = -7 & Y = -2
-14+6 = -8
X=-10 & Y =-4
-20+12 = -8
Eliminate A & D
Statement 2: Insufficient
If we re-arrange statement 2, we get, 4X-6Y = -16
2(2X-3Y) = -16
2X-3Y = -8
This is the same as the 1st statement.
So eliminate B
Since Both the statements are same, we won't be able to deduce the value. So, combining the statements won't help.
So, eliminate C
Answer E
\)
Statement 1: Insufficient
X and Y can have multiple values.
X = -7 & Y = -2
-14+6 = -8
X=-10 & Y =-4
-20+12 = -8
Eliminate A & D
Statement 2: Insufficient
If we re-arrange statement 2, we get, 4X-6Y = -16
2(2X-3Y) = -16
2X-3Y = -8
This is the same as the 1st statement.
So eliminate B
Since Both the statements are same, we won't be able to deduce the value. So, combining the statements won't help.
So, eliminate C
Answer E
09 Mar 2022, 07:04
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Bunuel
Target question: What is the value of x ?
Key concept: A single linear equation with two variables is insufficient to determine the individual value of one of the variables.
With this in mind, we can immediately conclude that statements 1 and 2 alone are insufficient, which means we can head straight to....
Statements 1 and 2 combined
Statement 1 tells us that 2x -3y = -8
Statement 2 tells us that 16 + 4x = 6y
Key concept: If these two linear equations with two variables were different, then we'd be able to solve the system for the individual values of x and y.
In this case, the two equations are equivalent. Here's why:
Take for the first equation: 2x -3y = -8
Add 8 to both sides, and add 3y to both sides: 2x + 8 = 3y
Multiply both sides of the equation by 2 to get 4x + 16 = 6y, which is equivalent to the second equation.
Since the two equations are equivalent, the combined statements are NOT SUFFICIENT
Answer: E
Cheers,
Brent
