Jill's mom made 4 pies for dessert for the week. jill wants to bring a slice of pie to school everyday for the next 10 days. if she wants to eat the same amount of pie every day, how much pie should she bring for lunch each day?

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?