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A certain meter records voltage between 0 and 10 volts inclusive. If t
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04 Aug 2021, 07:06
04 Aug 2021, 07:06
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A certain meter records voltage between 0 and 10 volts inclusive. If the average value of 3 recordings on the meter was 8 volts, what was the smallest possible recording in volts?
A. 2
B. 3
C. 4
D. 5
E. 6
A. 2
B. 3
C. 4
D. 5
E. 6
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Re: A certain meter records voltage between 0 and 10 volts inclusive. If t
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04 Aug 2021, 07:25
04 Aug 2021, 07:25
Carcass wrote:
A certain meter records voltage between 0 and 10 volts inclusive. If the average value of 3 recordings on the meter was 8 volts, what was the smallest possible recording in volts?
A. 2
B. 3
C. 4
D. 5
E. 6
A. 2
B. 3
C. 4
D. 5
E. 6
Sum of values = (# of values)(mean)
So, sum of the 3 readings = (3)(8) = 24
To MINIMIZE one of the readings, we must MAXIMIZE the other two readings.
The maximum reading is 10, so let two of the readings equal 10.
Since the sum of all 3 readings must be 24, the last remaining reading (the SMALLEST reading) must equal 4
Answer: C
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Re: A certain meter records voltage between 0 and 10 volts inclusive. If t [#permalink]
04 Aug 2021, 07:25
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