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How many people have the same name and birthday as you?
MartinByrne
The first thing to note is that names and birthdays are independent of each other. Someone born on 5th June isn't more likely to be called Chris, and someone called Katie isn't more likely to be born on 20th October, or whatever.
Thus the probability is equal to the probability someone has your name, multiplied by the probability someone has your birthday.
The latter is just 1/365.25, as you are equally likely to be born on each day.
The former could be anything. If you have a really common name, that 1 in 1,000 people have, then the probability of someone having the same birthday and name as you will be 1/365,250
Multiply this probability by the world population (which we'll round to 7 billion) and you get:
7,000,000,000/365,250
= 19,165
so 19,165 people would have the same name and birthday as you!
Wiki User
∙ 12y ago
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How many people have a birthday on the same day?
The answer is 9 000 000 people
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.
How many people have the same birthday in the US?
EVERYBODY in the US has the same birthday as someone else in the US. The converse would be that someone in the US has his/her own birthday and nobody else in the entire population of 300,000,000 people in the US was born on that day.
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 there has to be at least one pair.
How many people have the same birthday in the world?
It must be about 360,000 - the approximate number of world births per dayit is estematet to be that 150 million or billion(i cant remember) people share your birthday
How many people do you know of that have your birthday?
3 people that I know have th same birthday as me.
What is the name for a person that has the same birthday as you but is not related?
There is no special name for a person with the same birthday as yours and is not related. There may be thousands of people with your birth date.
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.
How many people have a birthday on the same day?
The answer is 9 000 000 people
How many people have the same birthday as Justin Bieber If you have the same birhday as Justin Bieber then post your birthday HERE?
I dont have the Same birthday as Justin but mine is March 8th.
How many people celebrate their birthday per year?
7billion people....the same amount of people there are on the earth
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.
How many people share the same birthday on average in the world?
estimating about 5000
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.
How many people has the same birthday as you feb 20?
my birthday is not at feb 20. my birthday is at September 27 and there's a singer lil Wayne who has his birthday on September 27
How many people have the same birthday in the US?
EVERYBODY in the US has the same birthday as someone else in the US. The converse would be that someone in the US has his/her own birthday and nobody else in the entire population of 300,000,000 people in the US was born on that day.
How many Alyssa's are in the world?
If you go to www.howmanyofme.com you can see how many people share the same name as you!
