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 answer:c ( but I think it should be D)
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发表于 2010-6-28 11:38:22
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