GMAT 考满分题库

Magoosh - 数学PS - 172
In a certain sock drawer, there are 4 pairs of black socks, 3 pairs of gray socks and 2 pairs of orange socks. If socks are removed at random without replacement, what is the minimum number of socks that must be removed in order to ensure that two socks of the same color have been removed?
  • A4
  • B7
  • C9
  • D10
  • E11
正确答案: A

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