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[Problem Solving]

试题详情

题目:

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?

选项:

A、0
B、1/9
C、2/9
D、1/3
E、1

答案:

C

提问:

老师这道题能跟我讲一下用排列组合的公式方式怎么理解吗?您看我图里的理解方式对吗?

解答:

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阅读1239
解答: 徐小梅

提问:

老师这道题能跟我讲一下用排列组合的公式方式怎么理解吗?您看我图里的理解方式对吗?

解答:

点赞0
阅读1240
解答: 徐小梅老师

提问:

老师能解释一下这道题为什么选C吗?

解答:

点赞0
阅读1337
解答: 徐小梅老师

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