作业帮一道GMAT数学题,不太会,请大家帮忙解答一下啊,谢谢
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一道GMAT数学题,不太会,请大家帮忙解答一下啊,谢谢
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
答案是C
会的给个解释吧
谢谢
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
答案是C
会的给个解释吧
谢谢
C 3*2*1 =6 3*3*3=27 6/27=2/9
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