Question

A production lot of 12 electric motors can be rejected or sold, depending on the result...

A production lot of 12 electric motors can be rejected or sold, depending on the result of the following inspection process: 3 random motors are chosen without replacement and inspected. If one or more are defective, the lot is rejected; otherwise it is accepted. 
Suppose that each of the motors cost $  65 and sell for $ 110. If the lot contains 2 defective motors, what is the expected profit?

Answer: $ --60

HINT: Use Excel function =HYPGEOMDIST ( )

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the expected profit is 0.5

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