ISRO | ISRO CS 2020 | Question 4
What is the availability of the software with following reliability figures.
Mean Time Between Failures (MTBF) is 20 days
Mean Time To Repair (MTTR) is 20 hours
Explanation: Convert into the same unit then apply the formula.
= MTBF / (MTBF + MTTR)
= 20*24 / (20*24 + 20)
= 480 / 500
= 96 %
Option (D) is correct.
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