A system has three components and all three components need to be operational for 24 hours;
Monday to Friday. During a particular week, failure of component 2 occurred as follows:
•Monday = 6 PM to 9 PM
•Tuesday = 8 AM to 10 AM
•Wednesday = No failure
•Thursday = 8 PM to 9 PM
•Friday = No failure
•Saturday = 5 AM to 8 AM
•Sunday = 6 PM to 9 PM
What is the mean time between failures on component 2?
A.
30 Hours
B.
38 Hours
C.
40 Hours
D.
42 Hours