• An express delivery service promises to overnight delivery ofall packages checked before 5 pm. The delivery service is notperfect, however, and sometimes delays do occur. If delays occur inthe evening flight to a major city from which distribution is made,then a package will not arrive on time with a probability of 0.25.It is also known thaat 10% of the evening flights to the major cityare delayed. What percentage of the packages arrive late? (Assumethat all packages are sent out on the evening flight to the majorcity and that all packages arrive on time if the evening flight isnot delayed.