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The life of Philips voice recorder is normally distributed with a mean of 4.1 years and a standard deviation of 1.3 years. A voice recorder

The life of Philips voice recorder is normally distributed with a mean of 4.1 years and a standard deviation of 1.3 years. A voice recorder is guaranteed for 3 years. We are interested in the length of time a voice recorder lasts.Find the probability that a voice recorder will break down during the guarantee period.

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