If the number X of particles emitted during a 1-h period from a radioactive source has a Poisson distribution with parameter 2 = 4 and that the probability that any emitted particle is recorded is p =...

Extracted text: If the number X of particles emitted during a 1-h period from a radioactive source has a Poisson distribution with parameter 2 = 4 and that the probability that any emitted particle is recorded is p = 0.9, find the probability distribution of the number Y of the particles recorded in a 1-h period and hence the probability that no particle is recorded.