Concept explainers
Choosing Seats If 4 people enter a bus that has 9 vacant seats, in how many ways can they be sealed?
To find: How many ways can four people be seated?
Answer to Problem 14RE
3024
Explanation of Solution
Given:
4 people enter a bus that has 9 vacant seats.
Formula used:
Calculation:
4 people have to be seated in 9 vacant seat.
Here order is significant hence this is a case of permutation.
Number of ways 4 people can be seated is given by .
There are 3024 ways four people be seated in 9 vacant seats.
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