The Incomprehensible Scale of 52!

3 Points

Ball Head GIF

2 Points

Me and a friend spent 4.5 hours last night discussing the cross over of the birthday paradox and this logic, as I didn’t really understand how the 2 might cross over. The odds become a lot better, but still extremely unlikely that you would shuffle a deck of cards the same way:

https://www.reddit.com/r/math/comments/190elq/birthday_paradox_on_a_deck_of_cards/

The odds would be 1.05x10^34 to 1. Take into consideration that there have been 4x10^17 seconds since the assumed Big Bang at 13 billion years ago, and you would have to square the number of seconds to find that duplicate.

2 Points

Posted 9 years ago.

Only comment 7 months ago…

First in search results for “birthday paradox on playing cards” on google.

Reflect Season 2 GIF by Law & Order

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2 Points

There’s a discussion on stackexchange:

1 point

It took me a while to work this one out, but seems obvious now and is part of the reasoning behind the birthday paradox: it is more likely that 2 people would share the same birthday in a classroom of 23 than if an individual were to pick a date of birth and a child had that matching date. The odds of that would be something like “365!”, although of course, in real world data, there is weighting towards some months having more births than others.