statistics
posted by Anonymous .
Air America is considering a new policy of booking as many as 400 persons on an airplane that can sear only 350. (Past studies have revealed that only 85% of the booked passengers actually arrive for the flight.) Estimate the probability that if Air America books 400 persons, not enough seats will be avaliable. Is that probability low enough to be workable, or should the policy be changed?

What are the chances that a person who is murdered actually knew the murderer? About 64% of people who are murdered actually knew the murderer. Suppose that a detective file in New Orleans has 63 unsolved murders. What is the probability that
A )at least 35 of the victims knew their murderers?
B) at most 48 of the victims knew their murderers?
c)less than 30 victims did not know their murderer?
d) More than 20 victims did not know their murderer?