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A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.8 years, and standard deviation of 0.9 years. If you

A manufacturer knows that their items have a normally distributed lifespan, with a mean of 3.8 years, and standard deviation of 0.9 years. If you randomly purchase one item, what is the probability it will last longer than 4 years?

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