作者ENatalie (为什麽一定要长大)
看板Statistics
标题[问题] 请问统计问题
时间Sat Jan 6 12:43:32 2007
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~
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