白球&黑球 - 猜謎

By William
at 2009-01-30T19:28
at 2009-01-30T19:28
Table of Contents
給你50個白球和50個黑球和兩個一模一樣的箱子,,
將這100個球如何分別放入兩個箱子裡,
在你看不見的情況下任意調換兩個箱子,
讓你連續拿11次球,
如何分配可以讓你拿出白球的機率為70%呢?
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http://blog.xuite.net/cgt798/carina
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猜謎
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By Vanessa
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