{"id":23473,"date":"2008-04-18T18:12:00","date_gmt":"2008-04-18T18:12:00","guid":{"rendered":"https:\/\/www.pokerstrategy.com\/zh\/glossary\/_163"},"modified":"2026-07-16T03:59:49","modified_gmt":"2026-07-16T03:59:49","slug":"aeoeyaeoeae%c2%bc","status":"publish","type":"glossary","link":"https:\/\/www.pokerstrategy.com\/zh\/glossary\/_259\/","title":{"rendered":"\u671f\u671b\u503c"},"content":{"rendered":"

定义<\/h2>

\n期望值就是指在一种局面下考虑了所有的结果以及不同结果出现的可能性之后长期情况下得到的平均值。\n<\/p>

\n \n<\/p>

期望值的计算<\/h2>

\n为了能计算出期望值，我们必须知道所有情况出现的概率。EV是建立在考虑了所有的结果，不同结果出现的可能性以及不同结果盈利情况之上的。 \n<\/p>

<\/p>

\nEV<\/a> = P(结果 1) * 盈利 1 + P(<\/i>结果 <\/i> 2) *<\/i>盈利 <\/i>2 + ... + P(<\/i>结果 <\/i>n) * <\/i>盈利 <\/i> n<\/i>\n<\/p>

\n例子:<\/b>\n<\/p>

\n2个玩家玩掷硬币，如果人头朝上，那么玩家A赢1美元，字朝上玩家B赢1美元。硬币人头和字朝上的概率都是50%。那么2个玩家的EV就是：\n<\/p>

<\/p>

\nEV<\/a> = 50% * (+1$) + 50% * (-1$) = 0$<\/i>\n<\/p>

\n另外一种计算下注利益的方法是：\n<\/p>

\nEV(下注<\/a>) = 底池赢率 - 下注<\/a><\/i>\n<\/p>

\n例子: <\/b>\n<\/p>

\n玩家A和B公平的玩掷硬币。盈利多少和之前一样。现在不同的就是在每局开始之前玩家都交付1美元到底池中然后最后的赢家将赢取底池。因此每个玩家赢取$2的激烈都是50%。他们底池的赢率都是\n<\/p>

\n50%* $2=$1.因此EV：\n<\/p>

\nEV<\/a> = 赢率<\/a> - 下注<\/a> = 1$ - 1$ = 0$<\/i>\n<\/p>

<\/i>
\n因此每个玩家都没输没赢。<\/p>


\n相关主题：<\/b>
\n赢率(Equity)<\/p>

缩写：<\/b>
\nEV<\/a>
\n <\/b><\/p>\n","protected":false},"excerpt":{"rendered":"

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