6. baggage fees. (2.38 in is) an airline charges the following baggage fees: $25 for the first bag and $35 for the second. suppose 54% of passengers have no checked luggage, 34% have one piece of checked luggage and 12% have two pieces. we suppose a negligible portion of people check more than two bags. a) build a probability model, compute the average revenue per passenger, and compute the corresponding standard deviation. b) about how much revenue should the airline expect for a flight of 120 passengers