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In a study to improve the life of Ground Engaging Tools on an Excavator thereliability engineer decided to model the lifetime of teeth as exponentially

In a study to improve the life of Ground Engaging Tools on an Excavator thereliability engineer decided to model the lifetime of teeth as exponentially distributed. Their data indicated that the probability a tooth will last 1100 working hours is 0.38. What the probability of failure of a tooth if they move to a fixed time replacement period of 2 weeks (336 hours)?

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