连续两次投掷骰子得到的点数(m,n)共有: (1,1),(1,2),(1,3),(1,4),(1,5),(1,6) (2,1),(2,2),(2,3),(2,4),(2,5),(2,6) (3,1),(3,2),(3,3),(3,4),(3,5),(3,6) (4,1),(4,2),(4,3),(4,4),(4,5),(4,6) (5,1),(5,2),(5,3),(5,4),(5,5),(5,6) (6,1),(6,2),(6,3),(6,4),(6,5),(6,6).共36个 若,的夹角能成为直角三角形的内角,则m≥n 共有(1,1),(2,1),(2,2),(3,1),(3,2),(3,3), (4,1),(4,2),(4,3),(4,4),(5,1),(5,2), (5,3),(5,4),(5,5),(6,1),(6,2),(6,3), (6,4),(6,5),(6,6).共21个 故,的夹角能成为直角三角形的内角的概率P== 故答案为: |