What are the odds someone has the same birthday as you?

What's the chance that two people share the same birthday? The first person can be born on any day of the year, this means that the probability is 365/365 = 1. The second person has to be born on the same day as the first and there is a 1/365 chance of that happening.

How common is it to have the same birthday as someone?

One person has a 1/365 chance of meeting someone with the same birthday. Two people have a 1/183 chance of meeting someone with the same birthday.

How likely is it to share a birthday?

The chance of: two people sharing a birthday would be 1 - (364/365), or 0.3%, or 1 in 370. three people sharing a birthday would be 1 - ((364/365)(363/365)), or 0.8%, or 1 in 122. four people sharing a birthday would be 1 - ((364/365) )(363/365)(362/365)), or 1.6%, or 1 in 61, and so on.

What are the odds that someone has the same birthday and name?

Ignoring leap years, there are 365 days in a year so the probability a given person has the same birthday as you is 1/365. Of the 620 people with the same name, we expect that 620/365 or approximately 1.7 people will have the same name and the same birthday as you.

How many people share my birthday?

What Are the Odds? When it comes down to it, if your birthday falls on any day other than February 29, the odds of sharing your birthday with anyone you meet should be approximately 1/365 in any population (0.274%).

The Birthday Paradox

Are birthdays randomly distributed?

In reality, birthdays are not uniformly distributed. The answer is that the probability of a match onlly becomes larger for any deviation from the uniform distribution. This result can be proved rigorously but involves more mathematics.

What is the rarest birthday?

According to the chart, Christmas Day is the least common birthday, followed by New Years Day, and Christmas Eve and the 4^th of July. There are also fewer birthdays on the 13^th of each month, as compared to the 12^th and 14^th.

What is the rarest month to be born in?

February 29 has the lowest total number of births over the twenty year period because it only occurs once every 4 years. However, the average number of births on February 29 takes into account the day only occurs on a leap year, resulting in a value just under the overall daily average.

What's the most popular birthday?

This weekend, millions of Americans may have that feeling when the country's most popular birth date comes around. Birth data shows that Sept. 9 is the most common birthday in the U.S., and September is the busiest month for births overall.

What is the most common birthday and why?

According to real birth data compiled from 20 years of American births, mid-September is the most birthday-packed time of the year, with September 9th being the most popular day to be born in America, followed closely by September 19th.

Is the birthday paradox real?

The birthday paradox is strange, counter-intuitive, and completely true. It's only a “paradox” because our brains can't handle the compounding power of exponents. We expect probabilities to be linear and only consider the scenarios we're involved in (both faulty assumptions, by the way).

What is the unluckiest month to be born in?

Some studies say that the babies with the lowest birth weight are born in May — chalk it up to the lower amounts of vitamin D in the womb during a winter pregnancy. A study done in the U.K. showed that May is the luckiest month to be born, and October is the unluckiest.

What birth month lives the shortest?

Those who have birthdays in May, June or July are likely to die younger than people born at other times of the year. The most recent link between birth month and diminished life expectancy is an analysis of more than 360,000 deaths in the German region of North Rhine Westphalia from 1984 to 1999.

What birth month lives the longest?

OCTOBER: People born in October live the longest.

Is there a day without birthdays?

Christmas and New Year's are days of celebration in many parts of the world when people gather with family and friends. One thing many typically don't celebrate on those days is a birthday. That's because Dec. 25 is the least popular day in the U.S., Australia and New Zealand to give birth.

What is the least popular birth date?

Is it true that nobody was born on December 6 2006?

That's 2843 famous people (and counting) and none of them born on December 6th. The 6th has been the lone holdout for a couple of years now.

What month has the most birthdays and why?

August is the overall most popular month for birthdays, which makes sense, considering a late August birthday means December conception. Cold weather, snow, romantic fires and holiday parties seems to create just the right equation for the beginning of human mating season.

Is it possible to have 2 birthdays?

It is the Queen's birthday on Thursday 21 April - but she also has another one later in the year. The Queen has two birthdays - her real one - in April, as she was born on 21 April 1926. Then a second one - the official celebration - on the second Saturday of June.

Which zodiac is the luckiest?

Sagittarius

In fact, three of our four astrology experts consider it the luckiest sign of them all (our fourth expert put it in their top three.)

What month are intelligent babies born?

Those born in September are, apparently, the smartest out of the entire year. According to Marie Claire, a study published in the National Bureau of Economic Research found that there's a clear correlation between the month during which you were born and how smart you are.

Can soulmates have the same birthday?

6. There is synchronicity in each others birthdays. Twin-Flames also share familiarity between birthdays, they may be born on the same month, of the same year, or born on the same calendar day, born on different day but born at the same time. All of which are indications the two souls were one.

How many people in a room before they have the same birthday?

In a room of 70 people, there is a 99.9% chance that two people will have the same birthday. The "Birthday Paradox” is a fascinating example of probability. Probability theory is used in mathematics, finance, science, computer science, and game theory, just to name a few. But let's take a step back…

How many birthdays are there every day?

The UN estimates that around 385,000 babies are born each day around the world (140 million a year). This number will remain relatively stable in the 50 years from 2020 to 2070.