Difference between revisions of "Talk:2046: Trum-"

Explain xkcd: It's 'cause you're dumb.
Jump to: navigation, search
(The maths but went a bit wrong at the end)
Line 1: Line 1:
 
<!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.-->
 
<!--Please sign your posts with ~~~~ and don't delete this text. New comments should be added at the bottom.-->
  
This is not that weird.  If names were random then it would be a 1 in 456976 chance of a particular president matching another for the first 5, but this is a "Birthday Problem" with 44 presidents, so the probability of any two presidents sharing the first 4 characters is 456976!/(456976^44 (456976 - 44)!), which wolfram alpha is giving me a clearly incorrect answer of 0.99793...  but anyway, the point is the number won't be that low... where did I go wrong anyone?
+
This is not that weird.  If names were random then it would be a 1 in 26^4 = 456976 chance of a particular president matching another for the first 4, but this is a "Birthday Problem" with 44 presidents, so the probability of any two presidents sharing the first 4 characters is 456976!/(456976^44 (456976 - 44)!), which wolfram alpha is giving me a clearly incorrect answer of 0.99793...  but anyway, the point is the number won't be that low... where did I go wrong anyone?

Revision as of 15:48, 14 September 2018


This is not that weird. If names were random then it would be a 1 in 26^4 = 456976 chance of a particular president matching another for the first 4, but this is a "Birthday Problem" with 44 presidents, so the probability of any two presidents sharing the first 4 characters is 456976!/(456976^44 (456976 - 44)!), which wolfram alpha is giving me a clearly incorrect answer of 0.99793... but anyway, the point is the number won't be that low... where did I go wrong anyone?