That is actually a quote from the John Cook article[0] and so you can find the details of the random process there. [0]: https://www.johndcook.com/blog/2008/10

That is actually a quote from the John Cook article[0] and so you can find the details of the random process there. [0]: https://www.johndcook.com/blog/2008/10/21/what-happens-when-you-add-a-new-teller/ https://www.johndcook.com/blog/2008/10/21/what-happens-when-...