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试卷名称:GMAT（QUANTITATIVE）数学模拟试卷2

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In an animal behavior experiment, 50 tagged white pigeons and 200 tagged gray pigeons were released from a laboratory. Within one week, 88 percent of the white pigeons and 80.5 percent of the gray pigeons had returned to the laboratory. What percent of the total number of pigeons returned to the laboratory?

A．80.5

B．82

C．82.5

D．85

E．86.5

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[*] [*] 8 9 10 [*]

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In an animal behavior experiment, 50 tagged white pigeons and 200 tagged gray pigeons were released from a laboratory. Within one week, 88 percent of the white pigeons and 80.5 percent of the gray pigeons had returned to the laboratory. What percent of the total number of pigeons returned to the laboratory? 80.5 82 82.5 85 86.5

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