- #1
wintermute++
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Homework Statement
How many different sets of birthdays are available with k people and 365 days when we don’t distinguish the same
birthdays in different orders?
Homework Equations
[/B]
I approached this using what was proven in a previous problem, provided I did that right. This what I had:
## C_{n+k-1, k} ##
for combinations that involve repetitions.
The Attempt at a Solution
## C_{365+k-1,k} ##
Not much of an attempt at the solution since it seemed obvious enough. But the book says the answer is ## C_{365+k,k} ## and I'm struggling to get to this solution.