Assume that 96% of ticket holders show up for an airline flight. If a plane seats 200 people, how many tickets should be sold to make the chance of an overbooked flight (more ticket holders show up for a flight than there are seats available) is at most 10%. Solution Say no. of tickets booked = x Now only 0.96x will turn up No. of seats = 200 Now these 0.96x people should get a seat with 90% probability 200 / (0.96x) >=0.9 200/0.864 >= x x <=231.48 x = 231 Airline will make 231 reservations.