Hello,

By measuring pulses of uranium with a Geiger counter, those arriving to a rate of 2 per second. Measuring Plutonium, the arrival rate is 5 per second. Si durante dos segundos no se producen arrivos,

For two seconds if there are no arrivals,

What is the probability that uranium had been measuring?

I hope you or someone can help me, I still think that a conditional Poisson distribution is Erlang, but I'm not sure.

A greeting and thanks