because all airline passengers do not show up their reserved seat, an airline sells n = 125 tickets for a flight that holds only 120 passengers. The probability that a passenger does not show up is...

because all airline passengers do not show up their reserved seat, an airline sells n = 125 tickets for a flight that holds only 120 passengers. The probability that a passenger does not show up is 0.10. Assume that the passengers behave independently


calculate the variance of x

find the probability that the flight departs with empty seats

calculate the mean of x