Assume that there is a 1111​% 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 fourfour 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 fourfour hard disk​ drives, the probability that catastrophe can be avoided is nothing. ​(Round to six decimal places as​ needed.)

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 4ECP: Show that the probability of drawing a club at random from a standard deck of 52 playing cards is...
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Assume that there is a
1111%
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
fourfour
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
fourfour
hard disk drives, the probability that catastrophe can be avoided is
nothing.
(Round to six decimal places as needed.)
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