Statistics (was Re: I enjoy film)

[Caveman]

Hmmm. Let's do some statistics. Supposing that 80% of the camera owners 
are boneheads (in respect to photography) and 50% of the lab operators 
are boneheads (in respect to their work). What is the probability that 
when a customer enters a random lab, at least one of them 
client/operator is a bonehead ?

> It is just as likely that there is a large group
of boneheads with cameras as boneheads running photo labs.