An e-mail message can travel through one of two server routes. The probability of transmission error in each of the servers and the proportion of messages that travel each route are shown in the following table. Assume that the servers are independent. Probability of Error Percentage of Messages Server 1 Server 2 Server 3 Server 4 Route 1 30 0.01 0.025 Route 2 70 0.02 0.017 (a) What is the probability that a message will arrive without error? (b) If a message arrives in error, what is the probability it was sent through route 1?

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Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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An e-mail message can travel through one of two server routes. The probability of transmission error in each
of the servers and the proportion of messages that travel each route are shown in the following table. Assume that the
servers are independent.
Probability of Error
Percentage
of Messages
Server 1
Server 2
Server 3
Server 4
Route 1
30
0.01
0.025
Route 2
70
0.02
0.017
(a) What is the probability that a message will arrive without error?
(b) If a message arrives in error, what is the probability it was sent through route 1?
Transcribed Image Text:An e-mail message can travel through one of two server routes. The probability of transmission error in each of the servers and the proportion of messages that travel each route are shown in the following table. Assume that the servers are independent. Probability of Error Percentage of Messages Server 1 Server 2 Server 3 Server 4 Route 1 30 0.01 0.025 Route 2 70 0.02 0.017 (a) What is the probability that a message will arrive without error? (b) If a message arrives in error, what is the probability it was sent through route 1?
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