4 A small business has 8 workers. On a given day, the probability that any particular worker is off sick is 0.05 , independently of the other workers.
- A day is selected at random. Find the probability that
(A) no workers are off sick,
(B) more than one worker is off sick. - There are 250 working days in a year. Find the expected number of days in the year on which more than one worker is off sick.