Problem 4.17

Please include all solution steps, formulas and calculations. Reliability in series Rs=(R1)(R2)...(Rn), etc...

Karen Perez runs an office supply store that also performs simple office services, such as copying. It is time to purchase a new high-speed copier and Karen has learned that machine uptime is a critical factor in selection. She has gathered the following data on reliability and maintainability for the three copiers she is considering. Given all other factors are equal, which mancine should Karen purchase?

**Table pictured

1 Copier Mean Time Between Failures (Hours) Mean Time to Repair (Hours) Able Copy 40 Business Mate 80 240 4 8 Copy Whiz