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If the average (arithmetic mean) of 5 numbers is 30, what is the stand

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Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 6227
GMAT 1: 760 Q51 V42
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If the average (arithmetic mean) of 5 numbers is 30, what is the stand  [#permalink]

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17 Oct 2017, 03:24
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Difficulty:

35% (medium)

Question Stats:

52% (00:31) correct 48% (00:23) wrong based on 46 sessions

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[GMAT math practice question]

If the average (arithmetic mean) of 5 numbers is 30, what is the standard deviation of the numbers?

1) The smallest number of them is 30
2) The greatest number of them is 30

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Re: If the average (arithmetic mean) of 5 numbers is 30, what is the stand  [#permalink]

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17 Oct 2017, 03:27
MathRevolution wrote:
[GMAT math practice question]

If the average (arithmetic mean) of 5 numbers is 30, what is the standard deviation of the numbers?

1) The smallest number of them is 30
2) The greatest number of them is 30

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Re: If the average (arithmetic mean) of 5 numbers is 30, what is the stand &nbs [#permalink] 17 Oct 2017, 03:27
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