- #1
billy2908
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Homework Statement
So here's the problem. There is an elevator w/ 5 people equally likely to get off at any of the 7 floor.
What is the probability that no two passengers will get off the same floor.
Homework Equations
The probability of event should be P(E)= number of event outcome/ number of total outcome
The Attempt at a Solution
Total outcome should be 7^5 since
for first floor there can be 1,2,3,4, or 5 people getting off
second floor there can be 1,...,5 people getting off etc.
But I am not sure how to calculate the number of event outcomes.