Q) A company audit showed that of all bills that were sent out,
71% of them were paid on time,
18% were paid up to 30 days late, 9% were paid between 31 and 90
days late, and 2%
remained unpaid after 90 days. One bill is selected at random.
Note: Assume all bills were eventually
paid
a) What is the probability that the bill was paid on time?
b) What is the probability that the bill was paid late?