At the end of the 2017 football season, 48 Super Bowl games had been played with the current two football leagues (the NFC and AFC). The NFC has won two more games than the AFC. Determine the total number of wins by the AFC.​

Assume that there is a 11% rate of disk drive failure in a year. a. if all your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probability that during a year, you can avoid catastrophe with at least one working drive? b. if copies of all your computer data are stored on four independent hard disk drives, what is the probability that during a year, you can avoid catastrophe with at least one working drive?