If you are in a room with 22 other people, it’s more likely than not that two of them share a birthday.
There was something strange about the recent Women's World Cup in Australia. If you were paying close attention, you might have spotted it. Many of the international teams had players who were born on the same day of the year – they shared birthdays." or"the birthday paradox", which mathematicians like to use to confound our expectations.
. This is because we are not concerned about the particular day on which the birthday falls, just that there is a match. By the time we have 39 people assembled the probability rises to nearly 90% .To gain an insight into why the number required is so low, we can start by considering the number of pairs of people in the room – pairs of birthdays falling on the same day, after all, being what the question is about.
Belgique Dernières Nouvelles, Belgique Actualités
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