11. The voter turnout in the 1996 presidential election was approximately 9.6x10'. In 2012, the voter turnout was 1.3x10%. How many more people voted in the 2012 election than 1996?

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?