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Forum » The birthday paradox
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Thread: The birthday paradox

post 1626942713 12-29-2020, 04:43 PM
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The birthday paradox

If you have 23 people in the same room there’s a 50% chance 2 of the people in the room have the same date of birth.

Mind=blown.

What kind of devil math is this?
post 1626943173 12-29-2020, 04:48 PM
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If you have 23 people in the same room there's a 50% chance 2 of them banged your mum
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post 1626943273 12-29-2020, 04:49 PM
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Humans are terrible at probability.

Then again, people can't work out of a plane will take off on a treadmill and many people think mRNA vaccines change DNA so maybe humans are just retarded.
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post 1626943293 12-29-2020, 04:49 PM
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post 1626943603 12-29-2020, 04:52 PM
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367 people makes 100% chance

70 people makes 99.9% chance

23 people makes 50% chance

Like I get it... But I also dont. Maths is just so ****ed sometimes.
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post 1626943783 12-29-2020, 04:54 PM
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lol this is exactly why math is not my forte
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post 1626944373 12-29-2020, 05:00 PM
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Riddle me this: on your birthday you're 0 years old, and you remain 0 years old until after 1 year elapses. However, after your first birthday, you'll be 1 years old, even though you'll have lived 2 full years by your second birthday. So on your 24rd birthday, you've been alive for 24 full years, but you'll continue to call yourself 24, when really you're working on your 25th year of life. So shouldn't our age always be 1+ whatever our last birthday was?
post 1626944623 12-29-2020, 05:04 PM
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Originally Posted By Glutebrahhh⏩
Riddle me this: on your birthday you're 0 years old, and you remain 0 years old until after 1 year elapses. However, after your first birthday, you'll be 1 years old, even though you'll have lived 2 full years by your second birthday. So on your 24rd birthday, you've been alive for 24 full years, but you'll continue to call yourself 24, when really you're working on your 25th year of life. So shouldn't our age always be 1+ whatever our last birthday was?
nah
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post 1626944863 12-29-2020, 05:07 PM
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Originally Posted By WeBoutDat⏩
If you have 23 people in the same room there’s a 50% chance 2 of the people in the room have the same date of birth.

Mind=blown.

What kind of devil math is this?
Yet in my whole life, I have only met one single person who had the same date of birth as me
post 1626944933 12-29-2020, 05:07 PM
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Originally Posted By zknarc⏩
Humans are terrible at probability.

Then again, people can't work out of a plane will take off on a treadmill and many people think mRNA vaccines change DNA so maybe humans are just retarded.
the notion that DNA is the complete hereditary determinant is under question by several investigations. DNA polymerase, a nano-biomotor, is subjected to about 3 × 105 computational steps for every DNA base that the motor reads. Each of the internal microscopic states of the protein can store information, and these higher information storage densities cannot be stored in DNA alone. C-value paradox shows that organizational complexity is not determined by the DNA sequence, as a simple microorganism may carry larger DNA sequence than complex human. Even the form of an organism may evolve in absence of corresponding molecular evolution in DNA. Thus, the DNA is merely able to transfer the information for the shape of the proteins, not to transfer the information necessary to organize the proteins inside the cell. Experiments showed that Tetrahymena pyriformis cells and T. vorax microstomes maintain similar morphology with different proteins, while T. vorax microstomes and T. vorax macrostomes maintain different morphologies with similar proteins and the cellular configuration is not decided by the proteins they consist of. Apparently, the mechanisms behind cell (supra-cellular as well) organization and morphogenesis, thereby seem to be very difficult to describe in terms of a conventional molecular biological frame
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post 1626945213 12-29-2020, 05:10 PM
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Originally Posted By CeBKa⏩
the notion that DNA is the complete hereditary determinant is under question by several investigations. DNA polymerase, a nano-biomotor, is subjected to about 3 × 105 computational steps for every DNA base that the motor reads. Each of the internal microscopic states of the protein can store information, and these higher information storage densities cannot be stored in DNA alone. C-value paradox shows that organizational complexity is not determined by the DNA sequence, as a simple microorganism may carry larger DNA sequence than complex human. Even the form of an organism may evolve in absence of corresponding molecular evolution in DNA. Thus, the DNA is merely able to transfer the information for the shape of the proteins, not to transfer the information necessary to organize the proteins inside the cell. Experiments showed that Tetrahymena pyriformis cells and T. vorax microstomes maintain similar morphology with different proteins, while T. vorax microstomes and T. vorax macrostomes maintain different morphologies with similar proteins and the cellular configuration is not decided by the proteins they consist of. Apparently, the mechanisms behind cell (supra-cellular as well) organization and morphogenesis, thereby seem to be very difficult to describe in terms of a conventional molecular biological frame
Not really relevant but nice copypaste from Wikipedia
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post 1626945403 12-29-2020, 05:12 PM
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Originally Posted By Glutebrahhh⏩
Riddle me this: on your birthday you're 0 years old, and you remain 0 years old until after 1 year elapses. However, after your first birthday, you'll be 1 years old, even though you'll have lived 2 full years by your second birthday. So on your 24rd birthday, you've been alive for 24 full years, but you'll continue to call yourself 24, when really you're working on your 25th year of life. So shouldn't our age always be 1+ whatever our last birthday was?
negged
post 1626945713 12-29-2020, 05:15 PM
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Originally Posted By Glutebrahhh⏩
Riddle me this: on your birthday you're 0 years old, and you remain 0 years old until after 1 year elapses. However, after your first birthday, you'll be 1 years old, even though you'll have lived 2 full years by your second birthday. So on your 24rd birthday, you've been alive for 24 full years, but you'll continue to call yourself 24, when really you're working on your 25th year of life. So shouldn't our age always be 1+ whatever our last birthday was?
First of all - how dare you??


Happy birthday to you

With sore feet in shoes

You'd rather be home miissciing..

Your plans will fall through
Damn
post 1626945963 12-29-2020, 05:17 PM
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I think it would be 1/365 + 1/365... 23 times but its been a while
post 1626946213 12-29-2020, 05:19 PM
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A bat and a ball cost $1.10. The bat costs $1 more than the ball. How much is the ball?
Entire NYPD should go on strike. You'll see then how quickly the mayor changes his tone.

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post 1626946253 12-29-2020, 05:20 PM
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Maths is hard.
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post 1626946453 12-29-2020, 05:21 PM
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Originally Posted By WeBoutDat⏩
If you have 23 people in the same room there’s a 50% chance 2 of the people in the room have the same date of birth.

Mind=blown.

What kind of devil math is this?
Basically, it is not the probably that you will have the same birthday as someone, but any 2 people have the same birthday.
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post 1626946533 12-29-2020, 05:22 PM
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Originally Posted By Smegmalion⏩
A bat and a ball cost $1.10. The bat costs $1 more than the ball. How much is the ball?
I can do that one (0.05) but can’t figure the birthday chit out...
post 1626946803 12-29-2020, 05:25 PM
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Originally Posted By NealIRC⏩
Basically, it is not the probably that you will have the same birthday as someone, but any 2 people have the same birthday.
So if I had a 365 sided dice that I rolled 23 times, I would have a 50% chance of rolling the same number twice.
post 1626947373 12-29-2020, 05:30 PM
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Originally Posted By Goodguy03⏩
nah
Originally Posted By mesobuild⏩
negged
Originally Posted By Jandels⏩
First of all - how dare you??


Happy birthday to you

With sore feet in shoes

You'd rather be home miissciing..

Your plans will fall through
Well then.

I always thought it was an interesting concept.
post 1626947623 12-29-2020, 05:33 PM
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I've known like 3-4 dudes that have the same DOB as me. Including my best friend from Junior High and High School.

Life is weird life is strange.

365/10, other than leap year.
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post 1626947643 12-29-2020, 05:33 PM
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Originally Posted By Itouchyou⏩
If you have 23 people in the same room there's a 50% chance 2 of them banged your mum
One of the greatest 1rd responses ever
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post 1626947733 12-29-2020, 05:34 PM
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Originally Posted By LtGoose⏩
If you flip a coin there is a 100% chance OP is a *******
Lmao
I know who I am. And after all these years, there’s a victory in that.

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post 1626947833 12-29-2020, 05:34 PM
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Originally Posted By Itouchyou⏩
If you have 23 people in the same room there's a 50% chance 2 of them banged your mum
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post 1626948103 12-29-2020, 05:38 PM
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Originally Posted By Glutebrahhh⏩
Riddle me this: on your birthday you're 0 years old, and you remain 0 years old until after 1 year elapses. However, after your first birthday, you'll be 1 years old, even though you'll have lived 2 full years by your second birthday. So on your 24rd birthday, you've been alive for 24 full years, but you'll continue to call yourself 24, when really you're working on your 25th year of life. So shouldn't our age always be 1+ whatever our last birthday was?
No because only full years are counted.
post 1626948183 12-29-2020, 05:38 PM
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Originally Posted By WeBoutDat⏩
So if I had a 365 sided dice that I rolled 23 times, I would have a 50% chance of rolling the same number twice.
Nope.

Nope, that'd be (1/365)^23.
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post 1626948623 12-29-2020, 05:42 PM
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Originally Posted By NealIRC⏩
Nope.

Nope, that'd be (1/365)^23.
It's actually 0.5^22 because each time either hits or misses, 50/50.
post 1626949143 12-29-2020, 05:46 PM
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Originally Posted By Glutebrahhh⏩
Riddle me this: on your birthday you're 0 years old, and you remain 0 years old until after 1 year elapses. However, after your first birthday, you'll be 1 years old, even though you'll have lived 2 full years by your second birthday. So on your 24rd birthday, you've been alive for 24 full years, but you'll continue to call yourself 24, when really you're working on your 25th year of life. So shouldn't our age always be 1+ whatever our last birthday was?
You answered your own question. You are working on completing your 25th year of life but you are not yet 25.

When you are 24 you have only completed 24 years of life, so why would you call it 25?

If you want to be technical, add the months to your age. IE. 24 and 4 months old.
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post 1626949193 12-29-2020, 05:46 PM
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Originally Posted By mesobuild⏩
It's actually 0.5^22 because each time either hits or misses, 50/50.
Yea but he didn't say twice in a row.
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post 1626949433 12-29-2020, 05:50 PM
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Originally Posted By NealIRC⏩
Nope.

Nope, that'd be (1/365)^23.
Lol wut
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