![The mean time to repair (MTTR) for a repairable system is 30 minutes](https://www.gkseries.com/blog/wp-content/uploads/2023/09/The-mean-time-to-repair-MTTR-for-a-repairable-system-is-30-minutes.jpg)
Q. The mean time to repair (MTTR) for a repairable system is 30 minutes. When maintenance time changes from 20 minutes to 40 minutes, the net increase in maintainability is closest to
(A) 0.15 | (B) 0.25 | (C) 0.45 | (D) 0.60 |
Ans: 0.25
Sol:
![](https://www.gkseries.com/blog/wp-content/uploads/2023/09/Screenshot-844.png)
Q. The mean time to repair (MTTR) for a repairable system is 30 minutes. When maintenance time changes from 20 minutes to 40 minutes, the net increase in maintainability is closest to
(A) 0.15 | (B) 0.25 | (C) 0.45 | (D) 0.60 |
Ans: 0.25
Sol:
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