Appleton`s population is 400 greater than Berryville`s population. If Berryville`s population were reduced by 900 people, then Appleton`s population would be 3 times as large as Berryville`s population. What is Berryville`s current population?
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A1550
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B1650
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C1750
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D1850
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E1950
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正确答案: A