The development time for a photographic printing paper is normally distributed with mean 30 seconds
Question: The development time for a photographic printing paper is normally distributed with mean 30 seconds and variance 1.21 seconds2.
(a) What is probability that the development time is at least 28.5 seconds?
(b) What is the probability that the development time is at most 31 seconds?
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Deliverable: Word Document
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