If you put N people into a room how many unique birthdays will they have on average?

Anonymous

∙ 16y ago

Updated: 8/17/2019

In Mathematica:

Sum[((365!/(365 - k)!)) * k * StirlingS2[N, k], {k, 1, N}] / 365^N

StirlingS2 is a Stirling Number of the Second Kind:

http://en.wikipedia.org/wiki/Stirling_number_of_the_second_kind

Or you could just do 365*(1- (364/365)^N) LOLZ.

Wiki User

∙ 16y ago

What else can I help you with?

According to recent studies how many birthdays does the average person have?

The average European people have up to 70-80 birthdays!!!!

How many people have birthdays on their birthdays?

Millions around the world.

How many birthdays does an average person have?

An average person will have one birthday per year.

How many birthdays does the average woman have?

How many birthdays a person has depends on a lot of things, including their career, their lifestyle, and where they live. The average American woman will live to be 78 years old.

How many birthdays does a average of a man have?

1. Only his/her actual birth.

How many birthdays dose the average woman has?

She has 1 birthday but celebrates it yearly!

How many people have there birthdays on the 4th of June?

About 18 million worldwide.

How many birthdays in a year?

One! Why do people write such silly questions?

How many people have there birthdays in october?

It is difficult to know exactly how many people have October birthdays, but it is one of the most common months, with October 5th and 6th being the most popular birth dates of Americans.

Who birthday is it on the 21st of February?

Many millions of people have birthdays on 21st February.

How many birthdays are on feb 29?

1,556,232,100 people are born on a leap year!

Why was may30 famous?

Many famouse people have their birthdays in may 30 idiot!

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