if you mean they die the same day and month in different year, the answer is:
1/365= 0.27%
The number of people in the world minus a few because of leap years.
It's usually rare, but not impossible.
In you location or whole world?
not enough
1,556,232,100 people are born on a leap year!
Millions around the world.
ONE! you can only be born once a year!
10/1 per year.
5
367 people (not forgetting leap year) unless the participants are chosen based on their birthday.
500050005000
The average European people have up to 70-80 birthdays!!!!
No one has to have their birthday in August. Most people don't, considering August is one out of 12 months of the year. They have their birthdays whenever they are born, which in most cases, is never as predicted.
Yes, as everyone in the world has a birthday every year its around 3,999,999,999 birthdays. The exact number will never be known as people are born and die every day, and some rude people do not celebrate 'em. The number of birthdays on any particular day is about the same as the number of people in the world, divided by 365.
You can look at it this way. People are born on a certain day, and that is your birthday. However, in China, you are one year older after one new year's has gone by. So in China, you technically can have 2 birthdays. One that is the New Year's that is everyone's birthday and your own birth date.
Only one. After that they are birthday anniversaries.