1000 disks having 1,000,000-hour MTTF, if failed disks are being replaced with a new one, having the same as all having reliability characteristics, the number of disks that would be failed in a year (8760 hours) is

1000 disks having 1,000,000-hour MTTF, if failed disks are being repla

1.	1000 disks having 1,000,000-hour MTTF, if failed disks are being replaced with a new one, having the same as all having reliability characteristics, the number of disks that would be failed in a year (8760 hours) is
A.	4
B.	8
C.	9
D.	12
Answer» D. 12