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Average (arithmetic mean) of integers from -50 to -1

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Intern
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Joined: 22 Aug 2016
Posts: 32
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Kudos [?]: 9 [0], given: 5

Average (arithmetic mean) of integers from -50 to -1 [#permalink] New post 08 May 2017, 05:48
00:00

Question Stats:

62% (00:34) correct 37% (00:39) wrong based on 8 sessions
Compare Quantities

Quantity A
Average (arithmetic mean) of integers from -50 to -1 inclusive.


Quantity B
Average (arithmetic mean) of integers from -50 to 0 inclusive.


Can anyone please solve this? thanks
[Reveal] Spoiler: OA
GRE Instructor
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Joined: 10 Apr 2015
Posts: 1228
Followers: 45

Kudos [?]: 1105 [0], given: 7

Re: Average (arithmetic mean) of integers from -50 to -1 [#permalink] New post 10 May 2017, 06:18
Expert's post
HarveyKlaus wrote:
Compare Quantities

Quantity A
Average (arithmetic mean) of integers from -50 to -1 inclusive.


Quantity B
Average (arithmetic mean) of integers from -50 to 0 inclusive.



When the numbers in a set are EQUALLY SPACED, then the average = (smallest # + biggest #)/2

So, we get:
Quantity A: (-50 + -1)/2 = -51/2 = -25.5
Quantity B: (-50 + 0)/2 = -50/2 = -25

-25 is greater than -25.5

Answer:
[Reveal] Spoiler:
B


Cheers,
Brent
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Re: Average (arithmetic mean) of integers from -50 to -1   [#permalink] 10 May 2017, 06:18
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Average (arithmetic mean) of integers from -50 to -1

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