求一道很简单的数学概率题!英文稍好的进!现在是10月5日上午9点36 我希望到晚上六点前有结果!In the casino game called high-low ,there are three possible bets.Assume that $1 is the size of the bet .A pair of fair 6-side
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求一道很简单的数学概率题!英文稍好的进!现在是10月5日上午9点36 我希望到晚上六点前有结果!In the casino game called high-low ,there are three possible bets.Assume that $1 is the size of the bet .A pair of fair 6-side
求一道很简单的数学概率题!英文稍好的进!
现在是10月5日上午9点36 我希望到晚上六点前有结果!In the casino game called high-low ,there are three possible bets.Assume that $1 is the size of the bet .A pair of fair 6-sided dice is rolled and their sum is calculated.If you bet
Low ,you win $1 if the sum of the dice is {2,3,4,5,6}.if you bet high ,you win $1 if the sum of the dice is {8,9,10,11,12} if you bet on {7} you win $4 if a sum of 7 is rolled.Otherwise you lose on each of the three bets.In all three cases,your origional dollar is returned to you if you win.Find the expected value of the game to the better of the bet of high.
求一道很简单的数学概率题!英文稍好的进!现在是10月5日上午9点36 我希望到晚上六点前有结果!In the casino game called high-low ,there are three possible bets.Assume that $1 is the size of the bet .A pair of fair 6-side
题目：
在赌场游戏叫高有低,有三种可能的赌注.假设1美元的赌注的大小.阿对公平6面骰子是卷和他们的总和计算.如果你打赌
低,你赢1美元,如果骰子的总和为（2,3,4,5,6）.如果你打赌高,你赢1美元,如果骰子的总和（8,9,10,11,12）如果您在（7）赌你赢4美元,如果总和的7卷.否则你将失去对每三个投注.在所有三种情况下,您的原始美元返还给你,如果你赢.找到游戏的预期值的高赌注更好.
算式：
P(2)=(1/6)^2
P(3)=2(1/6)^2
P(4)=3(1/6)^2
P(5)=4(1/6)^2
P(6)=5(1/6)^2
P(7)=6(1/6)^2
P(8)=5(1/6)^2
P(9)=4(1/6)^2
P(10)=3(1/6)^2
P(11)=2(1/6)^2
P(12)=(1/6)^2
期望是[2(P(2)+...+P(6))+5P(7)+2(P(8)+...+P(12))]/3
算期望啊
先算分布
P(2)=(1/6)^2
P(3)=2(1/6)^2
P(4)=3(1/6)^2
P(5)=4(1/6)^2
P(6)=5(1/6)^2
P(7)=6(1/6)^2
P(8)=5(1/6)^2
P(9)=4(1/6)^2
P(10)=3(1/6)^2
P(11)=2(1/6)^2
P(12)=(1/6)^2
期望是[2(P(2)+...+P(6))+5P(7)+2(P(8)+...+P(12))]/3
你先翻译下吧，虽然单词很简单，但挤在一起还是太难看懂了。