排列與組合的難解問題?
2016-02-02 3:09 pm
A parking lot has 7 unoccupied parking spaces in a row, ONe unoccupied parking space can only be occupied by one car. 4 cards enter the parking lot and occupy the 7 unoccupied parking splaces at random. Find the probability that the 4 cars are not parked next to each other
回答 (1)
2016-02-02 4:13 pm
✔ 最佳答案
Suppose A, B, C, D, E, F, G are the 7 unoccupied parking spacesA, C, E, G：4 cars
B, D, F：no cars
The probability that the 4 cars are not parked next to each other
= 1/C(7,4)
= 1/35
收錄日期: 2021-04-23 23:45:57
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160202070921AAr2Gor