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The event that all 23 people have different birthdays is the same as the event that person 2 does not have the same birthday as person 1, and that person 3 does not have the same birthday as either person 1 or person 2, and so on, and finally that person 23 does not have the same birthday as any of persons 1 through 22. Let these events be ...
Your math basis is incorrect. The probability that 365 people have distinct birthdays is 365!/365^365. (1/365! is the probability that you take 365 people with distinct birthdays and, picking them one at a time, correctly pick them in birthday order). Let's work with smaller numbers: assume a 3-sided coin (it's more interesting than a two-sided ...
The birthday problem asks, for a set of n randomly chosen people, what is the probability that some pair of them will have the same birthday? The problem itself is mainly concerned with counterintuitive probabilities, but we can also tell by the pigeonhole principle that among 367 people, there is at least one pair of people who share the same ...
All four of Kristin Lammert's daughters were born on August 25 — but they're not multiples. The girls were born in 2015, 2018, 2021 and 2024.
Kristin and Nick assumed the baby would have to be born within 24 hours, making her birthday Aug. 24. But Valentina had other ideas. She made her arrival at 8:11am on Aug. 25, at just 5 pounds, 12 ...
'We plan to make every birthday a real family event where birthdays get celebrated individually and together.' News & Star says the chances of having four birthdays on the same day is 133,225 to 1.
How the age of a Korean person, who was born on June 15, is determined by traditional and official reckoning. Traditional East Asian age reckoning covers a group of related methods for reckoning human ages practiced in the East Asian cultural sphere, where age is the number of calendar years in which a person has been alive; it starts at 1 at birth and increases at each New Year.
Another family in Alabama (mom, dad and baby) share the same Dec. 18th birthday. Huntsville Hospital for Women & Children in Huntsville, where the baby was born, called the occurrence "a chance ...