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24 Oct 2018, 08:26
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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:
5%
(low)
Question Stats:
90% (00:41) correct
10%
(01:02)
wrong
based on 225
sessions
History
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Not Attempted Yet
Chethan92
Joined: 18 Jul 2018
Last visit: 21 Apr 2022
Posts: 914
Own Kudos:
Given Kudos: 95
Location: India
Concentration: Operations, General Management
Schools: IIMB EPGP'22 (M)
GMAT 1: 590 Q46 V25
GMAT 2: 690 Q49 V34
WE:Engineering (Energy)
Products:
24 Oct 2018, 10:30
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Each statement is individually insufficient.
Combining both gives,
8x+8y = 128
or 2x+2y = 32.
C is the answer.
Combining both gives,
8x+8y = 128
or 2x+2y = 32.
C is the answer.
05 Mar 2020, 07:31
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gmat1393
What is the value of 2x + 2y ?
(1) 3x + 5y = 60
(2) 5x + 3y = 68
(1) 3x + 5y = 60
(2) 5x + 3y = 68
Target question: What is the value of 2x + 2y ?
Statement 1: 3x + 5y = 60
Since there are infinitely many solutions to the equation 3x + 5y = 60, it seems likely that statement 1 it's not sufficient.
To verify this, let's TEST some values.
There are several values of x and y that satisfy statement 1. Here are two cases:
Case a: x = 20 and y = 0. In this case, the answer to the target question is 2x + 2y = 2(20) + 2(0) = 40
Case b: x = 0 and y = 12. In this case, the answer to the target question is 2x + 2y = 2(0) + 2(12) = 24
Since we cannot answer the target question with certainty, statement 1 is NOT SUFFICIENT
Statement 2: 5x + 3y = 68
There are several values of x and y that satisfy statement 2. Here are two cases:
Case a: x = 0 and y = 20. In this case, the answer to the target question is 2x + 2y = 2(0) + 2(20) = 40
Case b: x = 12 and y = 0. In this case, the answer to the target question is 2x + 2y = 2(12) + 2(0) = 24
Since we cannot answer the target question with certainty, statement 2 is NOT SUFFICIENT
Statements 1 and 2 combined
Statement 1 tells us that 3x + 5y = 60
Statement 2 tells us that 5x + 3y = 68
If we ADD the two equations we get: 8x + 8y = 128
Divide both sides of the equation by 4 to get: 2x + 2y = 32
Since we can answer the target question with certainty, the combined statements are SUFFICIENT
Answer: C
Cheers,
Brent
