GMAT 考满分题库

- 数学PS -
There is originally a mixture of 9 liters of x and water, with water accounting for 75%. How much water was poured and replaced with same amount of x, and the final volume of water accounted for 50%?
  • A2
  • B9/4
  • C5/2
  • D3
  • E13/4
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正确答案: B

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