{"show":[{"id":639,"catid":"24924,12247,21363,17247,25093,41539,44116,26942,43557,75197,26685,21362,98593,24925,96717,104148","title":"几何概率","subtitle":"几何概率","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/math/4.png","goals":null,"intro":"在有些问题中，实验的可能结果要用线段或平面区域表示，而事件的概率定义为部分线段的长度（部分区域的面积）和整条线段的长度（整个区域的面积）的比。这些概率与几何度量有关，数学上称为几何概率。","ratingnum":0,"rating":0,"hits":30,"teachername":"薛江辉","publisheruid":0,"uid":83,"xd":2,"deletedtime":null,"xk":3,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":385,"createdtime":1477011910,"updatedtime":1495069494},{"id":640,"catid":"24924,10116,12249,21363,25093,41537,44116,27059,43557,75866,26684,99917,104148,102918,102797","title":"列表法与树状图法","subtitle":"列表法与树状图法","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/math/6.png","goals":null,"intro":"列表法和树状图法是求概率的两种常用方法，它们各自的使用条件、适用范围和具体方法都是需要了解掌握的。","ratingnum":0,"rating":0,"hits":31,"teachername":"杨俊丽","publisheruid":0,"uid":83,"xd":2,"deletedtime":null,"xk":3,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":385,"createdtime":1477012034,"updatedtime":1495069447},{"id":647,"catid":"24924,10085,12247,25227,17353,25093,41537,44116,27060,43557,75866,26685,96717,98809,104148,102919","title":"游戏公平性","subtitle":"游戏公平性","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/math/4.png","goals":null,"intro":"游戏公平性的辨别主要通过概率来实现，如果各方获胜的概率相等,则该游戏公平；而如果各方获胜的概率不相等,则该游戏不公平。\r\n","ratingnum":0,"rating":0,"hits":27,"teachername":"杨俊丽","publisheruid":0,"uid":83,"xd":2,"deletedtime":null,"xk":3,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":385,"createdtime":1477012217,"updatedtime":1495069298},{"id":650,"catid":"10288,10116,12248,17352,25092,41538,44117,27058,43557,75865,26684,95561,99918,10084,96716,77854,98808,104149,102794","title":"利用频率估计概率","subtitle":"利用频率估计概率","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/math/5.png","goals":null,"intro":"用频率估计概率的“三个步骤”。首先判断，先判断某个试验的结果不是有限的或各种可能结果不一定是等可能的。其次试验，大量重复试验直至某事件发生的频率在某一数值附近波动。最后估计，用前面稳定数值估计该试验的概率。\r\n\r\n","ratingnum":0,"rating":0,"hits":42,"teachername":"杨俊丽","publisheruid":0,"uid":83,"xd":2,"deletedtime":null,"xk":3,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":385,"createdtime":1477012339,"updatedtime":1495069140},{"id":651,"catid":"10288,10118,12248,21365,17352,25092,41538,44117,27058,43557,75865,26684,21364,104149","title":"模拟实验","subtitle":"模拟实验","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/math/6.png","goals":null,"intro":"模拟实验是求事件的概率适用条件，包括每次实验的所有可能结果不是有限个，或每次实验的各种结果发生的可能性不相等。\r\n","ratingnum":0,"rating":0,"hits":31,"teachername":"杨俊丽","publisheruid":0,"uid":83,"xd":2,"deletedtime":null,"xk":3,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":0,"admin":385,"createdtime":1477012753,"updatedtime":1495068939},{"id":2443,"catid":"98592,24925,44116,96717,27058,98807,104148,102917,102796","title":"概率公式","subtitle":"概率公式","status":4,"type":"normal","price":30,"serializemode":0,"lessonnum":0,"smallpicture":"/dist/images/defaultcover/math/1.png","goals":null,"intro":"概率公式为 P(A)=m/n 。其中n表示:在一次试验中,可能出现的结果数，m表示事件A发生的结果数。","ratingnum":0,"rating":0,"hits":22,"teachername":"杨俊丽","publisheruid":0,"uid":81,"xd":2,"deletedtime":null,"xk":3,"nj":null,"ver":"","locked":0,"grade":0,"stage":3,"comment":"","remark":"","recommend":null,"admin":385,"createdtime":1491458486,"updatedtime":1495068400}],"xdxk":{"2648":{"name":"小学数学","xd":1,"xk":3},"467":{"name":"初中数学","xd":2,"xk":3},"215":{"name":"初中英语","xd":2,"xk":4},"394":{"name":"初中科学","xd":2,"xk":5},"226":{"name":"初中物理","xd":2,"xk":6},"534":{"name":"初中化学","xd":2,"xk":7},"660":{"name":"初中历史与社会","xd":2,"xk":20}},"count":"396","catname":{"639":"初中数学","640":"初中数学","647":"初中数学","650":"初中数学","651":"初中数学","2443":"初中数学"},"ispay":{"639":0,"640":0,"647":0,"650":0,"651":0,"2443":0},"fmtime":{"639":"2017-05-18 09:04","640":"2017-05-18 09:04","647":"2017-05-18 09:01","650":"2017-05-18 08:59","651":"2017-05-18 08:55","2443":"2017-05-18 08:46"},"videonum":{"639":1,"640":1,"647":1,"650":1,"651":1,"2443":1},"pages":"    <ul 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