You and your family go to Chick-Fil –A for dinner. Your mom and dad both order meals. You order a meal and an ice cream cone. The ice cream cone is $1.89. Your family’s bill is $20.46. What is the cost of one meal?

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?