The answer is C. is right
Answer:
c 44
Step-by-step explanation:
Answer:
962
Step-by-step explanation:
8658/9
Answer:

Step-by-step explanation:
Given
--- rate of hard disk drives failure
--- number of hard disk drives
<em>See comment for complete question</em>
Required

First, calculate the probability that the none of the 4 selected is working;



Using the complement rule, the probability that at least 1 is working is:

This gives:

