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Updated on: 11 Jan 2014, 05:10
Originally posted by marcodonzelli on 20 Jan 2008, 03:18.
Last edited by Bunuel on 11 Jan 2014, 05:10, edited 1 time in total.
Last edited by Bunuel on 11 Jan 2014, 05:10, edited 1 time in total.
Renamed the topic, edited the question, added the OA and moved to DS forum.
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(1) d + y = -3
(2) e + z = 12
Updated on: 16 Apr 2018, 12:45
Originally posted by BrentGMATPrepNow on 03 Nov 2016, 14:42.
Last edited by BrentGMATPrepNow on 16 Apr 2018, 12:45, edited 1 time in total.
Last edited by BrentGMATPrepNow on 16 Apr 2018, 12:45, edited 1 time in total.
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marcodonzelli
The figure above shows two entries, indicated by m and n, in an addition table. What is the value of n + m?
(1) d + y = -3
(2) e + z = 12
Target question: What is the value of n + m?
Notice that the table tells us that m = d + z and that n = e + y
So, m + n = (d + z) + (e + y)
So we can REPHRASE the target question...
REPHRASED target question: What is the value of d + z + e + y?
Statement 1: d + y = -3
This information provides only half of the information we need.
We still need the values of z and e in order to find the sum of d + z + e + y
Since we cannot answer the REPHRASED target question with certainty, statement 1 is NOT SUFFICIENT
Statement 2: e + z = 12
This information provides only half of the information we need.
We still need the values of d and y in order to find the sum of d + z + e + y
Since we cannot answer the REPHRASED target question with certainty, statement 2 is NOT SUFFICIENT
Statements 1 and 2 combined
Statement 1 tells us that d + y = -3
Statement 2 tells us that e + z = 12
So, d + z + e + y = (d + y) + (e + z) = (-3) + (12) = 9
Since we can answer the REPHRASED target question with certainty, the combined statements are SUFFICIENT
Answer:
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20 Jan 2008, 03:43
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Information from table:
d+z=m (1)
e+y=n (2)
need to find "m+n"
A: d+y=-3, INSUFF - no information about n
B: e+z=12, INSUFF - no information about m
Adding 1 and 2 (under information)
(d+y)+(e+z)=m+n=12-3=9 (use both A and B)
Information from table:
d+z=m (1)
e+y=n (2)
need to find "m+n"
A: d+y=-3, INSUFF - no information about n
B: e+z=12, INSUFF - no information about m
Adding 1 and 2 (under information)
(d+y)+(e+z)=m+n=12-3=9 (use both A and B)
