There are 40 students in an elementary statistics class on

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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 a grading times are independent and the instructor begins grading at 6:50 P.M. and grades continuously, the (approximate probability that he is through grading before the 11:00 P.M. TV news begins is probability is

If the sports report begins at 11:10 P.M., the probability that he misses part of the report if he waits until grading is done before turning on the TV is

Reference no: EM13645133

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