###### Asked in Science, Statistics, Birthdays, Probability

Science

Statistics

Birthdays

Probability

# How many people share your birthday?

## Answer

###### Wiki User

###### 05/30/2012

On average every day there are 1.9 million people celebrating their birthday. That is the total global population (7 billion) divided by the number of days in a year (365).

## Related Questions

###### Asked in Birthdays, Probability

### How many people have the same birthday as you?

If there are 300,000,000 people in the US, then on average you
share your birthday with over 82,000 people. Of course, if your
birthday is 2/29, you would share it with about 1/4th of that
number.
...

Read More

###### Asked in Birthdays, Probability

### How many people share there birthday with someone else?

Everyone shares their birthday with someone or another.

Read More

###### Asked in Social Sciences, Calendar, Birthdays

### Approximately how many people was born on 28th August 1985?

Approxiamately six million people are born share a birthday so
if you were born on that day you share your birthday with about six
million people.
...

Read More

###### Asked in Probability

### How many people in school share a birthday?

There cannot be a definite answer. There can only be a
probabilistic answer of the number of people who might be expected
to share a birthday. However, in order to do that it is necessary
to know how many people there are in the school. And since you have
not bothered to share that crucial bit of information, I cannot
provide a more useful answer.
...

Read More

###### Asked in Probability

### How many people around the world share the same birthday as you?

A person shares their birthday with at least nine million
different people around the world.
...

Read More

###### Asked in Probability

### On average how many people share the same birthday?

On average, in the entire world about twenty eight thousand
people will have the same birthday as one another. In a room full
of people, there should be two people who have the same
birthday.
...

Read More

###### Asked in Statistics, Birthdays, Probability

### How many people are needed in a room before two of them share the same birthday?

For the chance to be at least 50% that two people share
the same birthday, there needs to be 22 people. For the chance to
be exactly 100% that two people share the same birthday, there
needs to be 366 people. If there was 365 people, there would be a
very small chance that each person in the room would have different
birthdays. With 366 people, there are not enough individual days
for every person to have a different birthday, so...

Read More

###### Asked in Demographics, Birthdays, Probability

### How many people have the same birthday in the world?

It must be about 360,000 - the approximate number of world
births per day
it is estematet to be that 150 million or billion(i cant remember)
people share your birthday
...

Read More

###### Asked in Birthdays

### How many people does the average child share his birthday with?

Roughly 20 million people unless he was born February 29. For
those, about 5 million.
...

Read More

###### Asked in Birthdays, Probability

### What do you call two people that share the same birthday?

If they are related then they are twins?

Read More

###### Asked in Statistics, Probability

### What is the probability that 25 people dont share the same birthday?

The probability that 25 random people don't ALL share the same
birthday is:
1 - (1/365)**24, or about
0.999999999999999999999999999999999999999999999999999999999999968
However, I suspect you meant to ask "What is the probability
that 25 random people all have different birthdays?" That is:
1 * (364/365) * (363/365) * (362/365) * ... * (342/365) *
(341/365) = 0.4313
So about 43% of the time nobody will share a birthday, and 57%
of the time, two or more people will share a birthday.
...

Read More

###### Asked in Birthdays

### How many people have the same birthday as you do?

Let's see. Given the fact that a baby is born every 3 seconds,
and there are 86,400 seconds in a day, we divide that and we get
28,800. So 28,800 people in the world share the same birthday as
you do :)
...

Read More

###### Asked in Probability

### What is the smallest number of people in a room where the probability of two of them having the same birthday is at least 50 percent?

23. The probability that at least two people in a room share a
birthday can be expressed more simply, mathematically, as 1
minus the probability that nobody in the room shares
a birthday.
Imagine a fairly simple example of a room with only three
people. The probability that any two share a birthday is :
1 - [ 365/365 x 364/365 x 363/365]
i.e. 1-P(none of them share a birthday)
=1 - [ (365x364x363) / 3653 ]
=0.8%
Similarly,
P(any two share a birthday in a...

Read More

###### Asked in Birthdays

### What famous people have share the same birthday as you February 7th?

Sonnay and alex are bored

Read More

###### Asked in Birthdays

### How many people die on there birthday?

70,000 people die on their birthday

Read More

###### Asked in Birthdays, Probability

### How many people have the Birthday of March 23?

How many people have the birthday of March 23 in the world?

Read More

###### Asked in Statistics, Probability

### Who are the 2 cricketers who share the same birthday?

Thousands of cricketers share the same birthday as another. If
you were to specify one cricketer, it would be simple task to find
several that share their birthday.
...

Read More

###### Asked in Statistics, Birthdays, Probability

### What is the probabililty of at least 2 people same birthday from a group of 13 people?

19.4%
CALCULATION:
The probability of at least 2 people having the same birthday in
a group of 13
people is equal to one minus the probability of non of the 13
people having the
same birthday.
Now, lets estimate the probability of non of the 13 people
having the same birthday.
(We will not consider 'leap year' for simplicity, plus it's
effect on result is minimum)
1. We select the 1st person. Good!.
2. We select the 2nd person. The probability that he doesn't
share the same
birthday with...

Read More

###### Asked in Birthdays

### How many people share the same birthday?

me and my firend Macy have the same birthday but we were born a
hour or so apart! THANKS FACEBOOK.COM We would have met if she came
to a college but she didnt! but we still met each other!
...

Read More

###### Asked in Birthdays, Probability

### Is it possible to inherit things from people that share the same birthday as you?

No. Unless they are blood-related to you (twins).

Read More

###### Asked in Valentine's Day

### Why do people think having a birthday on valintime is adorible?

Some people think having their birthday on Valentine's Day is
adorable because it is a day for love. It is also special when a
person can share their birthday with another popular holiday.
...

Read More

###### Asked in Celebrity Births Deaths and Ages

### What members of escape the fate share a birthday?

max green and ronnie radke share their birthday on
december 15th!

Read More

###### Asked in Time

### How many minutes a day do people share skin?

The answer, on average, is 0. Normal people do not share
skin.

Read More