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彩票是一种随机性极强的赌博游戏，很多人以为通过研究彩票的历史数据、分析彩票的走势、预测彩票的号码，就能找到所谓的“胜平负规律”，从而提高中奖的概率，彩票的随机性决定了任何试图预测彩票胜负的行为都是徒劳的，本文将从概率学的角度，深入分析彩票中的胜平负规律，帮助读者更好地理解彩票的随机性,以及如何科学地进行彩票投注。
彩票的基本知识
彩票是一种基于概率学的赌博游戏，通常由彩票发行机构设定一个随机的中奖号码，玩家通过购买彩票，尝试与中奖号码进行比较，以判断是否中奖，彩票的种类繁多，常见的有42选7彩票、32选7彩票、双色球彩票等，本文以42选7彩票为例,分析其胜负规律。
42选7彩票的基本玩法是：从1到42的42个号码中，选择7个号码作为投注号码，如果投注号码与中奖号码完全相同，则视为中奖，彩票的中奖等级和奖金是根据中奖号码的数量和位置来确定的，一等奖是中奖号码完全相同，二等奖是中奖号码中有6个正确，三等奖是中奖号码中有5个正确,依此类推。
彩票的理论概率
彩票的中奖概率是基于组合数学计算得出的，42选7彩票的总组合数为C(42,7)=269,612,520种，如果随机购买一张彩票，中一等奖的概率为1/269,612,520，中二等奖的概率为7/269,612,520，中三等奖的概率为21/269,612,520,依此类推。
从概率学的角度来看，彩票的中奖概率是均匀分布的，也就是说，每一张彩票的中奖概率是相同的，彩票的胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负胜负
彩票42选7胜负规律，从概率学角度解析彩票中的胜平负体育彩票42胜平负，
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