Explain probability values using normal distribution.
The time required to complete a final examination in a particular college course is usually distributed with a mean of 80 minutes and a standard deviation of 10 minutes. Please answer the subsequent questions.
1) Explain what is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes?
2) Presume that the class has 60 students as well as that the examination period is 90 minutes in length. How numerous students do you expect will be unable to complete the exam in the allotted time?