Birthday paradox - Try this out Watch

NiceToMeetYou
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#1
Hey there =]

Don't know if you've heard of the birthday paradox, but it basically states that once you reach 57 people in a room there is a 99% chance that they share the same birthday.

So to try this out, just post your birthday and we'll see how many people it takes before a birthday is shared

To start off - June 18th
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1992LP
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Sounds fun! 5th of June.
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Blake-inator
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June 25th
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pratstercs
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January 8th


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Jlrxx
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17th September
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Sufistic
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23rd of July

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uttamo
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5th of September
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Lexi99
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3rd march
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username807367
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9th September

In the do you share your birthday with a famous person thread, within 2 pages there were 2 other people with my birthday (and exact birthdate!) and at least 2 other pairs of shared birthdays.


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Denacio
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(Original post by 1992LP)
Sounds fun! 5th of June.
so close! 6th of june
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Mr plumby
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23rd january

Anyone?
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F1's Finest
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28th of June, anyone?
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Lit2010
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21st November
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freedom
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31st of dec
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Helen95
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30th August
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Ingenting
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26th February
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Officegirl4
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8th April


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hannxo
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7th July


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pjm600
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30th november
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NiceToMeetYou
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#20
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(Original post by Andy_J)
I have no idea how that works since the odds are 1 in 365 but ill go with it.

30th May
To get a 100% chance of success, you need 367 people due the the 1 in 366 (leap year) probability. However when the probability is under 100%, combinations increase the probability a lot quicker.

2 people, only 1 way in which the birthday can be shared
3 people there are 3 ways
4 people there are 6 ways
5 people there are 10 ways
etc...

and at 57 people, there are 1596 possible combinations!

Hence the high chance at such a low number!
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