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Social ScienceIf 5 people get on an elevator which will stop on 9 floors, a) what is the probability that no two(or more) get off the same floor? b) What is the probability that at least two get off on the same floor?
If 5 people get on an elevator which will stop on 9 floors, a) what is the probability that no two(or more) get off the same floor? b) What is the probability that at least two get off on the same floor?
Expert Answer
Given 5 people get on a elevator which will stop on 9 floors.
We need to find probability that no two (or more) get off on the same floor.
The total number of people, who can get down in floor 1 is 9, total number of people, who can get down in floor 2 is 9. Here we cna see that floors are chosen independently. So we say the total number of 95, different ways people can get down elevator.
Total events = 95.
The total number of ways o...
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