首页/ 题库 / [单选题]一个袋子里有10个小球,其中4个白球,6的答案

一个袋子里有10个小球,其中4个白球,6个黑球,无放回地每次抽取1个,则第二次取到白球的概率是多少?(  )

单选题
2021-07-17 21:12
A、2/15
B、4/15
C、1/5
D、2/5
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正确答案
D

试题解析

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