Suppose a quality manager for Dell Computers has collected the following data on the quality status of disk drives by supplier.She inspected a total of 700 disk drives. Based on these inspection data,what is the probability of randomly selecting a disk drive from company B?
A)0.07
B)0.28
C)0.021
D)0.76

Question

Suppose a quality manager for Dell Computers has collected the following data on the quality status of disk drives by supplier.She inspected a total of 700 disk drives.  Based on these inspection data,what is the probability of randomly selecting a disk drive from company B?
A)0.07 
B)0.28 
C)0.021 
D)0.76

Quizplus · Accepted Answer

According to the given data, out of the 700 disk drives, 420 were from company A and 280 were from company B. 
So, the probability of randomly selecting a disk drive from company B can be calculated as:
Probability = Number of disk drives from company B / Total number of disk drives
Probability = 280/700
Probability = 0.4
Therefore, the correct choice is B) 0.28, which is the closest option to the calculated probability of 0.4.

Suppose a Quality Manager for Dell Computers Has Collected the Following