Monkey in 40s: Probability of Picking Right Monkey in US Texas

[Endarmacional]

Problem:

A cage of 40 monkeys brought originally from England to US's Texas, one got sick of an unknown disease. How can I find the probability to pick up the right monkey that is not sick but next to the sick one.

 

[HallsofIvy]

First you will have to define what you mean by "next to". Are you assuming that the monkeys are lined up in some way?