- #1
brendan
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Homework Statement
9 people, 2 cars can hold 5 people each. only 3 people have licenses.
Homework Equations
How many different ways can the people be seated into cars?
The Attempt at a Solution
There are nine people. So number of seats is not a problem.
We must find out how many groups of three people with licenses there can be.
nPr = n!(n-r)!
n = 9
r = 3
nPr= 9!/(9-3)! = 504
How's that look?