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# If the average (arithmetic mean) of 5 positive temperatures

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If the average (arithmetic mean) of 5 positive temperatures [#permalink]  22 Jan 2008, 09:26
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If the average (arithmetic mean) of 5 positive temperatures is x degrees Farenheit, then the sum of the 3 greatest of these temperatures, in degrees Farenheit, could be

A. 6x
B. 4x
C. 5x/3
D. 3x/2
E. 3x/5
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Re: PS - average of temps [#permalink]  22 Jan 2008, 09:43
sonibubu wrote:
If the average (arithmetic mean) of 5 positive temperatures is x degrees Farenheit, then the sum of the 3 greatest of these temperatures, in degrees Farenheit, could be

A. 6x
B. 4x
C. 5x/3
D. 3x/2
E. 3x/5

B because the sum is between 3*x (because the sum of the lower 2 has to be less than 2*x) and 5*x (the sum is equal to 5*x and all temperatures are positive)
Re: PS - average of temps   [#permalink] 22 Jan 2008, 09:43
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