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 threeindependent hard disk​ drives, what is the probability that during a​ year, you can avoid catastrophe with at least one working​ drive?

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 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 three
independent hard disk​ drives, what is the probability that during a​ year, you can avoid catastrophe with at least one working​ drive?
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