假定你選了A。有三分之一的概率,A後麵有car,這種情況你switch就得不到car,但是,另外兩種情況(B或者C後麵有car),你switch都會得到car。所以概率是三分之二
假定你選了A。有三分之一的概率,A後麵有car,這種情況你switch就得不到car,但是,另外兩種情況(B或者C後麵有car),你switch都會得到car。所以概率是三分之二
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