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Math Expert V
Joined: 02 Sep 2009
Posts: 58410
For a certain set of z numbers, where z > 1, is the average (arithmeti  [#permalink]

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1 00:00

Difficulty:   55% (hard)

Question Stats: 54% (01:04) correct 46% (01:47) wrong based on 41 sessions

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For a certain set of z numbers, where z > 1, is the average (arithmetic mean) equal to the median?

(1) If the z numbers in the set are listed in increasing order, then the difference between any pair of successive numbers in the set is 2.
(2) The range of the z numbers in the set is 2(z − 1).

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Retired Moderator D
Joined: 25 Feb 2013
Posts: 1178
Location: India
GPA: 3.82
Re: For a certain set of z numbers, where z > 1, is the average (arithmeti  [#permalink]

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Bunuel wrote:
For a certain set of z numbers, where z > 1, is the average (arithmetic mean) equal to the median?

(1) If the z numbers in the set are listed in increasing order, then the difference between any pair of successive numbers in the set is 2.
(2) The range of the z numbers in the set is 2(z − 1).

Statement 1: implies z numbers are in AP series and in an AP series, Mean=Median. Sufficient

Statement 2: from the range we cannot determine the elements of the set. Insufficient

option A Re: For a certain set of z numbers, where z > 1, is the average (arithmeti   [#permalink] 08 Jan 2018, 09:38
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