ABS Specializes in Repair and Maintenance of Industrial Machines

question 47

Multiple Choice

ABS specializes in repair and maintenance of industrial machines.One repair technician has been assigned to five identical grinding machines for repair and maintenance.The machine breaks down after about 20 hours of use,and breakdowns have a Poisson probability distribution.It takes 6 hours to repair a machine,and repair times follow an exponential distribution.Machine downtime costs the company $250 an hour,and the technician is paid $50 an hour.Determine the average number of machines working.

• A)3.59
• B)2.87
• C)3.43
• D)2.54

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Definitions:

Psychodynamic Therapists

Therapists who focus on unconscious processes as they are manifested in a person's present behavior, based on the theories of Freud.

Conduct Disorder

A mental disorder diagnosed in childhood or adolescence characterized by a long-term pattern of disregarding the rights of others and violation of societal norms or rules.

Attention-Deficit/Hyperactivity Disorder

A neurological disorder characterized by difficulty maintaining attention, impulsivity, and hyperactivity.

Antisocial Personality Disorder

A psychological condition marked by persistent neglect or infringement of other people's rights.