

But if you married the a person with the same birthdate as you, could you end up marrying your own sibling either fraternal or identical twin?Would you marry a person with the same birthdate as you?And so was their son, 27 years later this past December.The odds of that happening are about one in 133,000, statisticians say. They learned about their shared birthday before they started dating, while just part of a group of friends who hung out together.The third person then has 20 comparisons, the fourth person has 19 and so on.If you add up all possible comparisons () the sum is 253 comparisons, or combinations. First, let’s assume that birthdays are randomly distributed — given enough people, you’ll have roughly the same number born on say, December 13th as you will on November 22nd or April 14th. — only then do you have a 50% chance of having the same birthday as someone else in the room.(As it turns out, this isn’t true.) Second, let’s assume that February 29th — Leap Day — doesn’t exist. It isn’t person 182 or 183 because some of the first two hundredsomething may share birthdays.


It would not matter to me if my husband had the same birth day as mine, and no i would not think that we were related just because we did. Though the odds of a father and his son sharing the same birthday and being born at the same time are about two in a million, a man in Michigan and his newborn did just that. According to a Bay City Times story, both were born on June 20 at a.m., 23 years apart. Consequently, each group of 23 people involves 253 comparisons, or 253 chances for matching birthdays. Materials • Groups of 23 or more people (10 to 12 such groups) or a source with random birthdays (see Preparation below for tips) • Paper and pen or pencil • Calculator (optional) Preparation • Collect birthdays for random groups of 23 or more people.
