Sure Stone Tire Company has established that the useful life of a particular brand of its automobile tires is normally distributed with a mean of 40,000 kilometres and a standard deviation of 5000 kilometres. What is the probability that a randomly selected tire of this brand has a life between 30,000 and 50,000 kilometres? O 0.9772 O 0.5000 O 0.4772 O 0.9544 O 1.0000

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