Acertain roller coaster has 3 cars, and a passenger is equally likely to ride inany 1 of the 3 cars each time that passenger rides the roller coaster. If a certain passenger is to ride the rollercoaster 3 times, what is the probability that the passenger will ride in eachof the 3 cars?
0
~$\frac{1}{9}$~
~$\frac{2}{9}$~
~$\frac{1}{3}$~
1
如果是抛硬币等互不干扰事件,3次的概率=每次的概率的立方
过山车的车厢是被拴着的,知道第一次坐的是哪节车厢、第二次坐的是哪节,所以第二次乘坐时可以把第一次乘坐的车厢排除掉,不属于互不干扰事件。
登录 或 注册 后可以参加讨论