Assume that there is a 9% rate ofdisk drive failure in a year a. tfal your compu

Question

Assume that there is a 9% rate ofdisk drive failure in a year a. tfal your computer data is stored on a hard disk drive with a copy stored on a second hard disk drive, what is the probablity that during a year, you can avoid catastrophe with at least one working drive? b. If copies of all your c one working drive? mpuder data ar siced o tiee ndspendent hard dskives shat he obalbliy hat tung a year, you can avoid catastropho with at te a. With two hard disk drives, the probability that catastrophe can be avoided is 0 9919 Round to four decimal places as needed) b. With three hard disk drives, the probability t Round to six decimal places as needed) that catastrophe can be avoided is 0999271

Explanation / Answer

both of your answers are coming right ; please revert if any other help is required :

a)P(cateastrophe can be avoided)=1-P(both disk drive crashed) =1-(0.09)2 =0.9919

b)(cateastrophe can be avoided)=1-P(all three disk drive crashed) =1-(0.09)3 =0.999271

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