Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
plot p(n)= 1- (365!/((365^n)(365-n)!)), 0<=n<=365
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random
