标题: 求解一道数学 [打印本页] 作者: ggirl626 时间: 2011-3-19 14:26 标题: 求解一道数学 a certain roller coaster has 3 cars, and a passenger is equally likely to ride in any one of the 3 cars each time that passenger rides the roller coaster. if a certain passenger is to ride the roller coaster 3 times, what is the probablity that the passenger will ride in each of the 3 cars? A, 0 B, 1/9 C, 2/9 D, 1/3 E, 1
