Assume that male and female births are equally likely and that the birth of any child does not affect the proability of the gender of any other children.  Find the probability of exactly five girls in ten births.

What is the probability there are at least 5 cars in the drive-thru?

Assume that male and female births are equally likely and that the birth of any child does not affect the probability of the gender of any other children. Find the probability of exactly three boys in seven births.

An airline has a policy of booking as many as 18 persons on an airplane that can seat only 17. past studies have revealed that only 81% of the booked passengers actually arrive for the flight.  find the probability that if the airline books 18 persons not enough seats will be available.