The mean incubation time for a type of fertilized egg

kept at 100.3​°F is 20 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 2 days

days.

​(a) What is the probability that a randomly selected fertilized egg hatches in less than 18 ​days?

​(b) What is the probability that a randomly selected fertilized egg hatches between 16 and 20 ​days?

​(c) What is the probability that a randomly selected fertilized egg takes over 22 days to​ hatch?

​(a) The probability that a randomly selected fertilized egg hatches in less than 18 days is

_____?

​(Round to four decimal places as​ needed.)

​(b) The probability that a randomly selected fertilized egg hatches between 16 and 20 days is

____?

​(Round to four decimal places as​ needed.)

​

(c) The probability that a randomly selected fertilized egg takes over 22 days to hatch is

____?

​(Round to four decimal places as​ needed.)

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