A corporation regularly takes deliveries of a particular sensitive part from three subcontractors. It found that the proportion of parts that are good or defective from the total received were as shown in the following table:

a. If a part is chosen randomly from all those received, what is the probability that it is defective?
b. If a part is chosen randomly from all those received, what is the probability it is from subcontractor B?
c. What is the probability that a part from subcontractor B is defective?
d. What is the probability that a randomly chosen defective part is from subcontractor B?
e. Is the quality of a part independent of the source of supply?
f. In terms of quality, which of the three subcontractors is most reliable?

Transcribed Image Text:

Subcontractor Part Good Defective 0.27 0.02 0.30 0.05 0.33 0.03