题目信息
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?
A:4
B:7
C:9
D:10
E:11
参考答案及共享解析

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已选答案:
正确答案:
A:4
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题目来源
Magoosh