Assume that there is a ​6% 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 independent hard disk​ drives, what is the probability that during a​ year, you can avoid catastrophe with at least one working​ drive?
a. With two hard disk​ drives, the probability that catastrophe can be avoided is
nothing.
​(Round to four decimal places as​ needed.)
b. With hard disk​ drives, the probability that catastrophe can be avoided is