機率 - 財經

By Kama
at 2005-11-25T11:47
at 2005-11-25T11:47
Table of Contents
某晚發生了計程車肇事逃逸的事件,而市內有兩家計程車公司,
分別以藍色和綠色車身作為標誌。
以下為已知資料:
a該市所有計程車中,綠色計程車佔百分之85,藍色佔百分之15。
b目擊者指認肇事車為藍色。法庭在與車禍發生當夜相同的環境狀況下,
測試證人的可信度。
結果證人從藍綠兩種顏色的計程車中,正確辨認出車身顏色的比例有百分之80,
而未能正確認出顏色的機率是百分之20。
在這個事件中,肇事者是藍色計程車的機率有多少?
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By Selena
at 2005-11-28T05:42
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