If the average (arithmetic mean) of 5 positive temperatures is x degrees Fahrenheit, then the sum of the 3 greatest of these temperatures in degrees Fahrenheit, could be
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A6x
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B4x
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C$${5}\frac{x}{3}$$
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D$${3}\frac{x}{2}$$
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E$${3}\frac{x}{5}$$
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正确答案: B