The number of defective blu-ray players among those produced by a large manufacturing firm follows a poisson distribution. for a particular 8-hour day, one defective player is found.
a) find the probability that it was produced during the first hour of operation for that day.
b)find the probability that it was produced during the last hour of operation for the day.
c)given that no defective players were seen during the first 4 hours of operation , find the probability that the defective player was produced during the fifth hour.