Question: Suppose a quality manager for Dell Computers has collected(4) the following data on the quality status of disk drives by supplier. She inspected a total

Suppose a quality manager for Dell Computers has collected(4)

the following data on the quality status of disk drives by supplier.

She inspected a total of 700 disk drives.

Drive Status

Supplier Working Defective

Company A 120 10

Company B 180 15

Company C 50 5

Company D 300 20

a.Based on these inspection data, what is the probability of randomly selecting a disk drive is from company D and working ?

b.What is the probability of a defective disk drive being received by the computer company?

c. What is the probability of a defect given that company B supplied the disk drive?

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