You Need to Evaluate 3 Service Providers,A,B,and C

Multiple Choice

You need to evaluate 3 service providers,A,B,and C.Their mean times between failures are 65,75,and 80 hours respectively.Their mean times to repair are 3,2,and 1 hours respectively.However,you receive a report that the mean time to repair for provider C is actually larger than 1 hour.What is the maximum value of the mean time to repair of provider C that would make you choose provider C?

A) 2.1155
B) 2.1355
C) 2.1455
D) 2.1555