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equal to the median

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by sanju09 » Wed Apr 08, 2009 4:12 am
Is Z equal to the median of the 3 positive integers X, Y, Z ?
(1) X < Y + Z.
(2) Y = Z.



OA B
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Source: — Data Sufficiency |
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by bluementor » Thu Apr 09, 2009 5:27 am
Is Z equal to the median of the 3 positive integers X, Y, Z ?
(1) X < Y + Z.
(2) Y = Z

Statement 1:
X < Y + Z

if X = 1, Z = 2, Y = 3, then Z is the median
if X = 2, Z = 1, Y = 3, then Z is not the median. Insufficient.

Statement 2:
Y = Z

Z must be the median in this case, since there are only 3 integers in total regardless of what X is.

Choose B

-BM-
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by vittalgmat » Thu Apr 09, 2009 3:18 pm
B for me as well.
Nothing to add to BM's excellent explanation.
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