# Question: consider writing onto a computer disk and then sending it...

###### Question details

Consider writing onto a computer disk and then sending it
through a certifier that counts the number of missing pulses.
Suppose this number *X* has a Poisson distribution with
parameter *μ* = 0.4. (Round your answers to three decimal
places.)

(a) What is the probability that a disk has exactly one missing
pulse?

(b) What is the probability that a disk has at least two missing
pulses?

(c) If two disks are independently selected, what is the
probability that neither contains a missing pulse?