Romi, a Production Manager, Is Trying to Improve the Efficiency

question 143

Multiple Choice

Romi, a production manager, is trying to improve the efficiency of his assembly line. He knows that the machine is set up correctly only 60% of the time. He also knows that if the machine is set up correctly, it will produce good parts 80% of the time, but if set up incorrectly, it will produce good parts only 20% of the time. Romi starts the machine and produces one part before he begins the production run. He finds the first part to be good. What is the revised probability that the machine was set up correctly?

• A) 48%
• B) 56%
• C) 86%
• D) 96%

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Definitions:

CD4 Glycoprotein

A protein on the surface of immune cells, such as T helper cells, that is involved in initiating the immune response.

Cytotoxic T

A type of lymphocyte (T cell) that kills cancer cells, cells that are infected (particularly with viruses), or cells that are damaged in other ways.

Intracellular Microorganisms

Microorganisms that live within the cells of a host, often causing disease or infection.

Cell-Mediated

Referring to immune responses that do not involve antibodies but rather the activation of phagocytes and antigen-specific cytotoxic T-lymphocytes.