在目前流行的高中数学复习资料中,常见一类概率题目,其提供的解法我认为是错误的.现仅举一例和同行商榷.原题:如图1所示,质点P在正方形ABCD的四个顶点上按逆时针方向前进.现在投掷一 In the current popular high school mathematics review materials, there is a common class of probabilistic topics, and the solution provided by them is considered to be wrong. Now only one example is discussed with peers. The original title: As shown in Figure 1, the mass point P is in the square ABCD’s IV. The vertices move counterclockwise. Now throw one