A Computer Store Offers Used Computers Free to Local Middle

question 42

Multiple Choice

A computer store offers used computers free to local middle schools. Of the 55 machines available, 15 have defective memories, 12 have defective keys, and the remainder have no defects. If a teacher picks one at random, what is the probability that she will select a defective computer? ​

• A)Pr(Defective) =
• B)Pr(Defective) =
• C)Pr(Defective) =
• D)Pr(Defective) =
• E)Pr(Defective) =

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Definitions:

Valve Division

A specific business unit within a company that focuses on the production and sale of valves.

Contribution Margin

The amount remaining from sales revenue after variable expenses have been subtracted, contributing to covering fixed costs and generating profit.

Special Motors

Custom-designed or specialized engines or motors that meet specific requirements not met by standard off-the-shelf products.

Standard Motor

A reference to a typical or commonly used engine or motor in various applications, often considered a benchmark.