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 河南成教 / 概率论与数理统计
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4、有标号1~n的n个盒子,每个盒子中都有m个白球k个黑球。从第一个盒子中取一个球放入第二个盒子,再从第二个盒子任取一球放入第三个盒子,依次继续,求从最后一个盒子取到的球是白球的概率

A. M/(M K)

B. M/(M-K)

C. M

D. M-K
 参考答案:
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