# DeVry MATH 221 The mean incubation time for a type of fertilized

The mean incubation time for a type of fertilized egg kept at 100.5Â°F is 23 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 1 day.(a) What is the probability that a randomly selected fertilized egg hatches in less than 21 days?(b) What is the probability that a randomly selected fertilized egg hatches between 22 and 23 days?(c) What is the probability that a randomly selected fertilized egg takes over 25 days to hatch?