Princess kate is trying on wedding dresses. each dress is too small, fits well, or is too big. princess kate estimates that 40% of the dresses will be too small and that 25% of dresses will be too big. what will kate estimate of percent of dresses will fit well

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?