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A manufacturer knows that their bunsen burners have a normally distributed lifespan, with a mean of 7.3 years, and standard deviation of 2.2 years. If

A manufacturer knows that their bunsen burners have a normally distributed lifespan, with a mean of 7.3 years, and standard deviation of 2.2 years. If you randomly purchase one bunsen burner, what is the probability it will last longer than 11 years

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