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If all your computer data is stored on a hard disk drive with a copy stored on a second hard diskâ drive, what is the probability that during aâ year, you can avoid catastrophe with at least one workingâ
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If all your computer data is stored on a hard disk drive with a copy stored on a second hard diskâ drive, what is the probability that during aâ year, you can avoid catastrophe with at least one workingâ drive?

User JamieL
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If all your computer data is stored on a hard disk drive with a copy stored on a second hard diskâ drive, what is the probability that during a year, you can avoid catastrophe with at least one workingâ drive?
The probability is .9879
User Ufuk
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