Your mail order company advertises that it ships 90% of its orders within three working days. You select a random sample of 100 of the 5,000 orders received in the past week for audit. The audit shows that 86 of these orders were shipped on time. If the company really ships 90% of its orders on time, find the probability that 86 or fewer were shipped on time. What do we know? What do we want to find? What do you expect the answer to be? How do I go from what I know to what I want to find out? Does this answer seem reasonable?