The Birthday Parado...
 

[Closed] The Birthday Paradox

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Trapped up a work today with a  big box of Krispy Kreme doughnuts for the office because it's my birthday.

Met our project manager at the door who was also carrying a bag full of cakes because, as it turns out, it's also his birthday. Our office has 16 people in it.

In two of my previous workplaces of similar size  I've also shared a birthday with other members of staff

Turns out that to achieve a 50 % probability of  two people in a randomly selected group sharing a birthday then you only need 23 people. A 99.9% probability is achieved at 70 people.

https://en.wikipedia.org/wiki/Birthday_problem

Maths  is weird.

So, who else's birthday is it today then?


 
Posted : 18/06/2019 11:52 am
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Tupac and Stan Laurel.


 
Posted : 18/06/2019 11:59 am
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Tupac and Stan Laurel.

although they work for different Co's which avoids the awkward 'two lots of cakes' scenario.


 
Posted : 18/06/2019 12:00 pm
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Me and Noel Edmunds. He never brings cake in.


 
Posted : 18/06/2019 12:01 pm
 DezB
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Tupac never bought cakes anyway. Kept his anniversaries very secret. Unlike 50 Cent.


 
Posted : 18/06/2019 12:03 pm
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Sod the maths. Where is our cake? You clearly log more hours here than your office so seems rude that you'd buy cake for that bunch of people you don't like but not us.


 
Posted : 18/06/2019 12:05 pm
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Unlike 50 Cent.

He'd kill for a biscuit.

Get Rich Tea or die Tryin'


 
Posted : 18/06/2019 12:07 pm
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Where is our cake?

I asked the bloke in the  Krispy Kreme store for the 1,498,443 Unique site visitors selection box.

He had to go and get the manager. I'm still waiting.


 
Posted : 18/06/2019 12:10 pm
 Mat
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I think you'll find "You'll find him with a club"


 
Posted : 18/06/2019 12:10 pm
 IHN
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Trapped up a work today with a big box of Krispy Kreme doughnuts for the office because it’s my birthday.

Shouldn't you have brought in a 98 piece Spicy Cardiac Infarction box, or whatever that thing is called you're so keen on?

Where is our cake? You clearly log more hours here than your office so seems rude that you’d buy cake for that bunch of people you don’t like but not us.

The man makes a good point


 
Posted : 18/06/2019 12:11 pm
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Shouldn’t you have brought in a 98 piece Spicy Cardiac Infarction box, or whatever that thing is called you’re so keen on?

That's for lunch. The doughnuts were for breakfast.


 
Posted : 18/06/2019 12:12 pm
 IHN
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Oh, and happy birthday.


 
Posted : 18/06/2019 12:14 pm
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Side Note: The Birthday Paradox is why using your birthday to help verify who you are (e.g. the NHS) is actually much less foolproof than you might instinctively expect.

Obviously adding the year helps, but if you are running a clinic of check ups for the over 70s, for example, then birth year doesn't add as many degrees of freedom as you expect either.


 
Posted : 18/06/2019 12:16 pm
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Oh and happy birthday Big PP.


 
Posted : 18/06/2019 12:17 pm
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Now I'm going to have to buy cakes later, damn you all.


 
Posted : 18/06/2019 12:20 pm
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Now I’m going to have to buy cakes later, damn you all.

Ooooh, is it your birthday?


 
Posted : 18/06/2019 12:22 pm
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Now I’m going to have to buy cakes later, damn you all.

Your birthday too?

Bah, beaten to it.


 
Posted : 18/06/2019 12:24 pm
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Tupac and Stan Laurel.

And me!

It goes.

June 15th Tahnee Seagrave
June 16th Me
June 17th Steve Peat

Coincidence, I think not.


 
Posted : 18/06/2019 12:24 pm
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Happy birthdays one and all!

Oh, and perchy, lest you should think that no one appreciates your Krispy Kreme order comment, I properly laughed. In the middle of a room with other people.


 
Posted : 18/06/2019 12:26 pm
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Me glupton , Frazer no fuss , Ben cathro and .......Hitler !


 
Posted : 18/06/2019 12:30 pm
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and …….Hitler !

What, like real Hitler? ....or Binners?


 
Posted : 18/06/2019 12:31 pm
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I'm looking forward to not driving back from holiday on my birthday this year, first time in three years.

Oh wait.

I'm driving to my holiday instead.

I'll still take a cake for the car.


 
Posted : 18/06/2019 12:33 pm
 IHN
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Whooooooooooah now, I've just realised that I, and everyone else, missed the most important point

with a big box of Krispy Kreme doughnuts for the office

Krispy Kreme doughnuts are disgusting.


 
Posted : 18/06/2019 12:38 pm
 DezB
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Wonder what year the panther was born...


 
Posted : 18/06/2019 12:40 pm
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Krispy Kreme doughnuts are disgusting.

Well, I wasn't going to waste good cakes on these arseholes.


 
Posted : 18/06/2019 12:41 pm
 kcal
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At school, I was the only person (as far as I know) with my birthday date.

Started at university in 1980, in halls of perhaps 100 students - 3 others with same birthday, 2 out of the 3 with same date/year (one a year older). Maths, as you say, is weird!


 
Posted : 18/06/2019 12:48 pm
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https://metro.co.uk/2019/06/13/city-boss-sends-sexist-email-entire-company-workers-love-glazed-rings-9938704/

Be careful not to mention glazed rings


 
Posted : 18/06/2019 12:55 pm
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Wonder what year the panther was born…

1972.

Would you also like to know my mothers maiden name and my first pet?


 
Posted : 18/06/2019 12:55 pm
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1972.

Would you also like to know my mothers maiden name and my first pet

First line of address and postcode too please


 
Posted : 18/06/2019 12:57 pm
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Maths  is weird.

For weird maths, google the Boy-Girl paradox, and the variant where you know that one of them was born on a Tuesday that the probability of the genders changes.

It'll be somewhere in there: https://en.wikipedia.org/wiki/Boy_or_Girl_paradox

Happy Birthday


 
Posted : 18/06/2019 1:28 pm
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Tupac never bought cakes anyway.

To be fair, he did sometimes bring in home-made buns in one of his plastic containers. Tupacware.

Unlike 50 Cent.

Hey shorty. You'll find me in the pub...


 
Posted : 18/06/2019 1:29 pm
 IHN
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1972.

Christ, you must have had a hard paper round


 
Posted : 18/06/2019 1:34 pm
 DezB
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Would you also like to know my mothers maiden name and my first pet?

Is that for your pron star name?


 
Posted : 18/06/2019 1:40 pm
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Krispy Kreme doughnuts are disgusting.

taste like diabetes 🙂

Type 3 diabetes minimum.

I went to visit a group of injured Libyan freedom fighters who we in the UK being fitted with prosthetic limbs. Knowing they all had a massively sweet tooth I bought them a box of 24 glazed and filled donuts on my way there. On arrival I was greeted by one of the nurses who saw the box and said

"Ha ha! are they all for me?"

"ha ha! - yes they are." I replied. Thinking she was joking.

She took them all, disappeared into her office and I never saw them again.


 
Posted : 18/06/2019 1:49 pm
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So I share a birthday with P-Jay, and there's far less than 70 people posting on this thread. Didn't know the Seagrave/Peat thing, but clearly they sucked up all the riding-god genes...


 
Posted : 18/06/2019 2:38 pm
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1972

Not only are we the same age, its my wifes birthday tomorrow and we are both working from home.   I hope shes bringing cakes in.

This thread is full of coincidence .


 
Posted : 18/06/2019 4:07 pm