Answer to Question #295002 in Statistics and Probability for kin

Question

.

If all of your computer data are stored on a hard disk drive with a copy stored on a second

hard disk drive, what is the probability that both drives will fail during a year?

Answer 1

Given that the failure rate of a hard drive is 10%=0.1, the probability that both hard disk drives will fail is,

p(failure)=p(failure of hard disk drive 1)$\times$ (failure of second hard disk drive)

p(failure)=0.1$\times$0.1 =0.01

Therefore, the probability that both drives will fail is 0.01