The mean incubation time for a type of fertilized egg kept at 100.4°F is 23days. Suppose that the incubation

times are approximately normally distributed with a standard deviation of 2days.

(a) What is the probability that a randomly selected fertilized egg hatches in less than 19 days?

(b) What is the probability that a randomly selected fertilized egg hatches between 21 and 23 days?

(c) What is the probability that a randomly selected fertilized egg takes over 27 days to hatch?

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