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The mean incubation time for a type of fertilized egg kept at 100.5°F is 19 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 2 days.
(a) What is the probability that a randomly selected fertilized egg hatches in less than17 days?
(b) What is the probability that a randomly selected fertilized egg hatches between 15 and 19 days?
(c) What is the probability that a randomly selected fertilized egg takes over 21 days to hatch?
