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# If in set A there is more than one number, is the average (arithmetic

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Math Expert
Joined: 02 Sep 2009
Posts: 49968
If in set A there is more than one number, is the average (arithmetic  [#permalink]

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02 Feb 2017, 11:10
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Difficulty:

45% (medium)

Question Stats:

57% (01:19) correct 43% (01:23) wrong based on 69 sessions

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If in set A there is more than one number, is the average (arithmetic mean) equal to the median?

(1) When listed in consecutive order each member of set A after the first is 2 greater than the previous member.
(2) Set A consists of an odd number of consecutive numbers.

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Director
Joined: 21 Mar 2016
Posts: 526
Re: If in set A there is more than one number, is the average (arithmetic  [#permalink]

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09 Feb 2017, 01:52
stat 1: its an equally spaced set

stat 2 : immaterial of odd/ even number of integers, the set is consecutive,, hence equally spaced

ans D
Intern
Joined: 24 Jun 2016
Posts: 4
Location: United States (CA)
Concentration: Finance, Economics
GMAT 1: 700 Q37 V49
GPA: 3.87
Re: If in set A there is more than one number, is the average (arithmetic  [#permalink]

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09 Feb 2017, 02:00
I agree with the above that the answer is D.

(1) Tells you that they are consecutive numbers by a difference of 2. You can plug in your head 2,4,6,8,10. The sum is 30, the average is (30/5) is 6. I doubled checked with the second random number sequence input 4, 6, 8, 10, 12. The sum is 40, the average is 8 (40/5). The average is still the median. This is sufficient.

(2) Tells you that they are consecutive. Just run through basic numbers again. 1,2,3,4,5. 2,3,4,5,6. The mean is equal to the median. This is also sufficient.

The correct answer is D, either. Kaplan tells you just to remember 1,2,T,E,N for A/B/C/D/E.
Re: If in set A there is more than one number, is the average (arithmetic &nbs [#permalink] 09 Feb 2017, 02:00
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