Q2:A certain roller coaster has 3 cars, and a passenger is equally likely to ride in any 1 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 probability that the passenger will ride in each of the 3 cars?
A.
0
B.
1/9
C.
2/9
D.
1/3
E.
1 这个题答案不是1/3*1/2=1/6么，c怎么算出来的？ | 
