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2.4. A submarine has three navigational devices but can remain at sea if at least two are working. Suppose that the failure times are exponential with means 1 year, 1.5 years, and 3 years. (a) What is the average length of time the boat can remain at sea? (b) Call the parts A, B, and C. Find the probabilities for the six orders in which the failurs can occur.

2.4. A submarine has three navigational devices but can remain at sea if at least two are working. Suppose that the failure times are exponential with means 1 year, 1.5 years, and 3 years. (a) What is the average length of time the boat can remain at sea? (b) Call the parts A, B, and C. Find the probabilities for the six orders in which the failurs can occur.

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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A1 Please only answer part (b)
2.4. A submarine has three navigational devices but can remain at sea if at least two are working. Suppose that the failure times are exponential with means 1 year, 1.5 years, and 3 years. (a) What is the average length of time the boat can remain at sea? (b) Call the parts A, B, and C. Find the probabilities for the six orders in which the failurs can occur.
Transcribed Image Text:2.4. A submarine has three navigational devices but can remain at sea if at least two are working. Suppose that the failure times are exponential with means 1 year, 1.5 years, and 3 years. (a) What is the average length of time the boat can remain at sea? (b) Call the parts A, B, and C. Find the probabilities for the six orders in which the failurs can occur.
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