作者ENatalie (为什麽一定要长大)
看板Statistics
标题Re: [问题] 请问统计问题
时间Sun Jan 7 00:31:10 2007
谢谢你^^
※ 引述《chrisjon (研究布丁狗)》之铭言：
: ※ 引述《ENatalie (为什麽一定要长大)》之铭言：
: : 这是在问什麽，还有该如何解呢?
: : Let D1,D2,D3 be three four-sideddice whose sides have been labeled as follows:
: : D1:0333 D2:2225 D3:1146
: : These side are rolled at random. Let A,B,and C be the events that the outcome
: : on die D1 is larger than the outcome on D2, the outcome on D2 is larger than
: : the outcome on D3, and the outcome on D3 is large than the outcome on D1,
: : respectively. Show that (a) P(A) =9/16, (b) P(B) = 9/16, (c) P(C) =10/16.
: : Do you find it interesting that each of the probabilities that D1 "beats"
: : D2,D2 "beats" D3, and that D3 "beats" D1 is greater than 1/2 ?
: : Thus it is difficult to determine the "best" die.
: : 谢谢~
: D1 D2 D3 分别是三个四面骰，四个面的点数分别为D1:0333 D2:2225 D3:1146
: 令A,B,C事件分别是骰出来的点数D1>D2、D2>D3、D3>D1
: 证明(a)P(A) = 9/16, (b) P(B) = 9/16, (c) P(C) = 10/16
: 查了一下beats是打败的意思，後面那段话好像没作用…
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