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1、概率论与数理统计第三章习题x 服从，在Excel依次输入：=binomdist（0，3，0.7，0），=binomdist（1，3，0.7，0），=binomdist（2，3，0.7，0），=binomdist（3，3，0.7，0），在Excel中输入：=1-binomdist(2,5,0.3,1)得0.1630820. 一长途客车沿途可停k各站，规定途中只可下客不能上客，一个站若无人下客可不停。设始发时车上乘客数是参数为的泊松分布随机变量，每个乘客在各车站中哪一站下车是等可能的，求有2个乘客在终点站下车的概率。解：用表示终点站下车的人数，则有21 某生产流水线一天出次品件数为的泊松分布，若采
2、用新工艺，则有0.75的可能使称为的泊松分布，但也有0.25的可能无效。现采用新工艺生产，结果一天出了2件次品。问新工艺有效的概率多大？（令“新工艺有效”。）解：设B表示生产两件次品的事件，新工艺有效生产2件次品的概率新工艺无效效生产2件次品的概率由贝叶斯公式22. 某设备一天故障次数服从泊松分布。已知一天内发生1次故障与发生2次故障的概率相同，求每天发生故障不超过1次的概率。解：由得：解之得：26.袋中有8个球，6个黑球、2个白球，每次从袋中取2个球，取出后不放回。在第3次取出球时，所得白球数为，求解：设表示前两次取球后剩余的事件前两次后剩下2个白球的概率为：，在此条件下第三次取得0个白球的
3、概率为：第三次取得1个白球的概率为：第三次取得2个白球的概率为：前两次后剩下1个白球的概率为：，在此条件下第三次取得0个白球的概率为：第三次取得1个白球的概率为：第三次取得2个白球的概率为：前两次后剩下0个白球的概率为：，在此条件下第三次取得0个白球的概率为：第三次取得1个白球的概率为：第三次取得2个白球的概率为：根据全概率公式27.一台仪器有3个元件，各个元件发生故障与否相互独立，且发生故障的概率分别为0.2，0.3，0.4。求发生故障元件总数的和解：设表示第一个元件发生故障，表示第二个元件发生故障，表示第三个元件发生故障。没有故障的概率为（英文版 ） Two regulations pro
4、mulgated for implementation is in the party in power for a long time and the rule of law conditions, the implementation of comprehensive strictly strategic plan, implementation in accordance with the rules and discipline to manage the party, strengthen inner-party supervision of major initiatives. T
5、he two regulations supporting each other, the adhere to a positive advocate, focusing on morality is of Party members and Party leading cadres can see, enough to get a high standard; around the party discipline, disciplinary ruler requirements, listed as negative list, focusing on vertical gauge, dr
6、aw the party organizations and Party members do not touch the bottom line . Here, the main from four square face two party rules of interpretation: the first part introduces two party Revised regulations the necessity and the revision process; the second part is the interpretation of the two fundame
7、ntal principles of the revision of laws and regulations in the party; the third part introduces two party regulations modified the main changes and needs to grasp several key problems; the fourth part on how to grasp the implementation of the two regulations of the party. and revised the necessity a
8、nd revised history of the CPC Central Committee the amendment to the Chinese Communist Party members and leading cadres honest politics several guidelines and column 1 by 2015 to strengthen party laws and regulations focus. Two party regulations revision work lasted a Years, pooling the wisdom of th
9、e whole party, ideological consensus, draw historical experience, respect for the wisdom of our predecessors, which reflects the unity of inheritance and innovation; follow the correct direction, grasp the limited goals, adhere to the partys leadership, to solve the masses of the people reflect a fo
10、cus on the problem. The new revision of the and , reflects the partys 18 and the eighth session of the third, the spirit of the fourth plenary session, reflecting the experience of studying and implementing the General Secretary Xi Jinping series of important speech, reflects the partys eighteen yea
11、rs comprehensive strictly practice. (a) revised two regulations of the party need of in based on revised, the promulgation and implementation of January 2010, to strengthen the construction of the contingent of leading cadres play an important role. But with the party to manage the party strictly ad
12、ministering the deepening, has not been able to fully meet the actual needs. Content is too complicated, eight prohibition, 52 are not allowed to hard to remember, and also difficult to put into practice; the second is concisely positive advocated by the lack of prohibited provisions excessive, no a
13、utonomy requirements; the third is banned terms and discipline law, both with the party discipline, disciplinary regulations repeat and Criminal law and other laws and regulations repeat; the fourth is to clean the theme is not prominent, not for the existing problems, and is narrow, only needle of
14、county-level leading cadres above. is in 1997 based on revision, in December 2003 the promulgation and implementation, to strengthen the construction of the party play very important role. Along with the development of the situation, which many provisions have been unable to fully meet the comprehensive strictly administering the practice needs. One is Ji law, more than half of the provisions and criminal law and other countries laws and regula
