Acme Airlines flies airplanes that seat 12 passengers. From experience, they have learned that, on average, 80% of the passengers holding reservations for a particular flight actually show up for the flight. If they book 13 passengers for a flight, what is the probability that 12 or fewer passengers holding reservations will actually show up for the flight?
a. less than 90%
b. between 90 and 95%, inclusive
c. more than 95%
d. cannot be determined from information given
Explains and provides answers to a multiple choice question on probability. The problem illustrates how binomial distribution is used to answer such questions.