Editing Elevator paradox (section)

== More than one elevator ==

If there is more than one elevator in a building, the bias decreases &mdash; since there is a greater chance that the intending passenger will arrive at the elevator lobby during the time that at least one elevator is below them; with an [[Infinity|infinite]] number of elevators, the probabilities would be equal.<ref name=knuth69>{{cite journal | last = Knuth | first = Donald E. | authorlink = Donald E. Knuth | title = The Gamow-Stern Elevator Problem | journal = [[Journal of Recreational Mathematics]] | volume = 2 | pages = 131–137 | date = July 1969 | publisher = Baywood Publishing Company, Inc. | issn = 0022-412X }}</ref>

In the example above, if there are 30 floors and 58 elevators, so at every minute there are 2 elevators on each floor, one going up and one going down (save at the top and bottom), the bias is eliminated – every minute, one elevator arrives going up and another going down. This also occurs with 30 elevators spaced 2 minutes apart – on odd floors they alternate up/down arrivals, while on even floors they arrive simultaneously every two minutes.