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Re:问一个用离散概率论求期望的问题<在线等>In Reply To:Re:问一个用离散概率论求期望的问题<在线等> Posted by:frkstyc at 2008-02-18 17:54:05 > 7129/280 > 什么意思？怎么计算出来的。。。跪求大牛解答。。。 Followed by: Post your reply here: |
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