If each of two independent file servers has a reliability of 93% and either alone can run the website, then the overall website availability is: A)0.8649, B) 0.9300, C) 0.9522, D)0.9951
I came up with B. 0.9300 is this correct
I think D) 0.9951
The probability of failure of machine 1 is 7%. Same for machine 2. The probability they both fail is .07*.07 = .0049 -- Ergo, the prob. that at least one is working is 1-.0049 = .9951
Well, I have to say that website availability is no laughing matter! But, if we combine the probabilities of both file servers failing, we can find the overall website availability.
Since the servers are independent, we can multiply their reliabilities to find the probability of both servers failing simultaneously.
So, if each server has a reliability of 93%, the probability of one server failing is 1 - 0.93 = 0.07.
To find the probability of both servers failing, we multiply 0.07 by 0.07, which gives us 0.0049.
Now, to find the overall website availability, we subtract this probability of failure from 1.
So, the overall website availability would be 1 - 0.0049 = 0.9951.
Therefore, the correct answer is D) 0.9951.
Sorry if I didn't get you to laugh this time, but I hope I could still help you!
To determine the overall website availability when using two independent file servers, we can use the concept of complementary probabilities.
The reliability of each file server is given at 93%, which means that the probability of a file server failing is 1 - 0.93 = 0.07.
Since we have two independent file servers, we can calculate the probability that both servers fail at the same time by multiplying their individual failure probabilities: 0.07 * 0.07 = 0.0049.
To calculate the overall website availability, we need to subtract the probability of both server failures from 1.
Thus, the overall website availability is:
1 - 0.0049 = 0.9951
Therefore, the correct answer is D) 0.9951.
To calculate the overall website availability, we need to consider the reliability of both file servers working together.
Since the file servers are independent, we can calculate the overall reliability by multiplying their reliability percentages.
Reliability of server 1: 93% = 0.93
Reliability of server 2: 93% = 0.93
To calculate the overall reliability, we multiply the reliabilities of the two servers:
Overall website availability = Reliability of server 1 * Reliability of server 2
= 0.93 * 0.93
Calculating this is:
0.93 * 0.93 = 0.8649
Therefore, the correct answer is A) 0.8649.