All Questions
Tagged with birthday coupon-collector
7
questions
3
votes
1
answer
149
views
$T$ Pokemon trainers catch a Pokemon every day. How many days does it take until two trainers own Pokemons of the same species?
$T$ Pokemon trainers catch $1$ out of $P$ different species of Pokemons every day.
Every species has the same chance to be caught.
One species can be caught by one trainer multiple times.
In mean ...
- 77
0
votes
2
answers
243
views
The Facebook Birthday Problem（Birthday Problem Variation） [closed]
The Facebook Birthday Problem:
This problem stems from the classic Birthday Paradox.
It says:
How many friends do you need for the probability of having at least one friend with a birthday each day ...
- 19
0
votes
1
answer
61
views
Collisions in a Sample [closed]
Based on birthday paradox;
Let $d$ be the set of elements randomly chosen from a set of $n$ distinct elements then
a) What is expected number of unique elements in $d$ (remaining will be repetition of ...
- 143
2
votes
1
answer
114
views
Probability that there exist at least one day without any Birthday
Probability that a given day do not have any birthday among N people is: (364/365)^N
However, what will be the probability that there exist at least one day in a year that have no birthday?
This ...
- 123
4
votes
1
answer
240
views
What is the probability that in a group of $n$ people, every month of the year has at least one birthday.
What is the probability that in a group of $n$ people, every month of the year has at least one birthday.
This is my approach:
We have 12 months, and the probability that a month has at least one ...
- 49
6
votes
3
answers
673
views
Birthday Problem - Company Stats Strange or Average?
I had a birthday problem question that I'm really interested in knowing the answer for:
In a group of 2,000 people, what is the probability of one day during the year that no one has that particular ...
5
votes
2
answers
2k
views
Coupon Problem generalized, or Birthday problem backward.
I want to solve a variation on the Coupon Collector Problem, or (alternately) a slight variant on the standard Birthday Problem.
I have a slight variant on the standard birthday problem.
In the ...
- 223