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 that all other factors are equal, which machine should Karenpurchase?

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Mean Time Between Failures (Hours 40 80 240 Mean Time to Repair Hours) Copler Able Copy Business Mate Copy Whiz