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22 Jan 2011, 06:36
Kudos
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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:
75%
(hard)
Question Stats:
49% (01:54) correct
51%
(01:24)
wrong
based on 176
sessions
History
Date
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Not Attempted Yet
Is the median of a set of 8 numbers > 20?
(1) 5 of the numbers have a value of at least 20
(2) Sum of the 8 numbers is 160
(1) 5 of the numbers have a value of at least 20
(2) Sum of the 8 numbers is 160
22 Jan 2011, 11:58
Kudos
Bookmarks
gmatbull
Is the median of a set of 8 numbers > 20?
(1) 5 of the numbers have a value of at least 20 --> if these 5 numbers equal to 21 then no matter what the other 3 numbers are the median will be 21, so more than 20 but it's also possible these 5 numbers to be equal to 20 and in this case median will be 20, so not more than 20. Not sufficient.
(2) Sum of the 8 numbers is 160 --> if all numbers equal to 20 then the answer will be NO but if the set is for example {0, 0, 0, 32, 32, 32, 32, 32} then the answer will be YES, as median in this case will be equal to 32.
(1)+(2) Again it's possible to have the answer YES (for example {0, 0, 0, 32, 32, 32, 32, 32}) as well as the answer NO (for example {0, 0, 0, 20, 20, 40, 40, 40}). Not sufficient.
Answer: E.
