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汽博会开幕在即,甲乙丙三个人得到了两张参观票,于是三个人通过抽签决定这两张票的归属。在所设计的三个签中有两个签上写着“有”,一个签上写着“无”,抽签顺序是甲先、乙次、丙最后抽取。如果已知乙已经抽到了参观票,则甲也抽到参观票的概率是:

单选题
2022-01-18 09:03
A、2/3
B、1/2
C、1/3
D、1
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正确答案
B

试题解析
条件概率问题,由于乙已经确定,在剩下的两张票(一张中奖一张不中奖)中,甲中奖的概率就是1/2。

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汽博会开幕在即,甲乙丙三个人得到了两张参观票,于是三个人通过抽签决定这两张票的归属。在所设计的三个签中有两个签上写着“有”,一个签上写着“无”,抽签顺序是甲先、乙次、丙最后抽取。如果已知乙已经抽到了参观票,则甲也抽到参观票的概率是:
()shall be liable for loss of and damage to the Vessel and/or goods arising or resulting from inaccuracies in stating the description,quantity,weight,measurement or contents.
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(), or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.
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