Hi. I'm looking for a quotable reference that looks something like Pr(at least one occurrence in time t | average waiting time = T) = 1-exp(-t/T) for events happening at random. Everywhere I look I find rate version 1-exp(-lambda.t) which is identical, but not the version I want.

Any clues? Cheers, kat

Any clues? Cheers, kat

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