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GMAT 考满分题库

- 数学PS -
In an art gallery, 25 percent of the art pieces on display were photographs. If 12 percent of the photographs were black-and-white photographs, what percent of the art pieces on display were black-and-white photographs?
  • A3%
  • B7%
  • C13%
  • D30%
  • E37%
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正确答案: A

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