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A certain meter records voltage between 0 and 10, inclusive

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A certain meter records voltage between 0 and 10, inclusive [#permalink]

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New post 27 Nov 2011, 07:26
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A certain meter records voltage between 0 and 10, inclusive. If the average of 3 readings was 8, what is the smallest possible reading?

A: 2
B: 3
C: 4
D: 5
E: 6
[Reveal] Spoiler: OA

Last edited by Bunuel on 03 Feb 2012, 05:56, edited 1 time in total.
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Re: GMATprep question [#permalink]

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New post 27 Nov 2011, 11:51
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If the average of three readings was 8, then the sum of the three readings would be 8*3 = 24.

Now, to get the smallest possible value for one reading, make the other two readings as large as possible (10). Therefore the smallest possible reading = 24 - 10 - 10 = 4

Option (C)
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Re: A certain meter records voltage between 0 and 10, inclusive [#permalink]

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New post 01 Aug 2017, 21:55
Bamsefar wrote:
A certain meter records voltage between 0 and 10, inclusive. If the average of 3 readings was 8, what is the smallest possible reading?

A: 2
B: 3
C: 4
D: 5
E: 6


Average of \(3\) readings was \(8\)

Therefore Sum of \(3\) readings \(= 8 * 3 = 24\)

Meter records voltage between \(0\) and \(10\), inclusive.

\(2\) Highest possible reading would be \(= 10 + 10 = 20\)

Therefore Smallest possible reading would be \(= 24 -20 = 4\)

Answer (C)...

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Re: A certain meter records voltage between 0 and 10, inclusive   [#permalink] 01 Aug 2017, 21:55
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