Because some passengers who make flight reservations do not showup to claim their reservations , airlines often overbook flights. A certain flight has capacity of seating 225 passengers. The airline believes that the rate of passenger"no-show" is 2% and has made reservations for 228 passengers for this flight. Let random variable X be the number of "no-show"s for this flight. Then E(X), the expected value of X, is:

4

4.56

4.5

5