For the question below, I'm confused in approaching it through binomial distribution and the two distinct variables How should I approach the question Thank you There are 40 students in an elementary statistics class On the basis of years of experience, the instructor knows that the time needed to grade a randomly chosen first examination paper is a random variable with an expected value of 6 min and a standard deviation of 6 min If grading times are independent and the instructor begins grading at 6 50 p m and grades continuously, what is the (approximate) probability that he is through grading before the 11 00 p m TV news begins Give your answer to 3 decimal places If the sports report begins at 11 10, what is the (approximate) probability that he misses part or all of the report if he waits until grading is done before turning on the TV

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Question: For the question below, I'm confused in approaching it through binomial distribution and the two distinct variables. How should I approach the question? Thank you!

For the question below, I'm confused in approaching it through binomial distribution and the two distinct variables. How should I approach the question? Thank you!

There are 40 students in an elementary statistics class. On the basis of years of experience, the instructor knows that the time needed to grade a randomly chosen first examination paper is a random variable with an expected value of 6 min and a standard deviation of 6 min.

If grading times are independent and the instructor begins grading at 6:50 p.m. and grades continuously, what is the (approximate) probability that he is through grading before the 11:00 p.m. TV news begins?Give your answer to 3 decimal places.
If the sports report begins at 11:10, what is the (approximate) probability that he misses part or all of the report if he waits until grading is done before turning on the TV?

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