P=(C(19,6)-7*(C(8,5)+C(7,5)+C(6,5)+C(5,5)))/10^7
=(27132-7*(56+21+6+1))/10000000
= 0.0026544
•
和我的算法算式一致,除非對算式有不同解釋。
-皆兄弟也-
♂
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06/15/2010 postreply
12:51:33
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