More on course grades. In Exercise 19.7 you explained how to simulate the grade of a randomly chosen student in a statistics course. Five students on the same floor of a dormitory are taking this course. They don’t study together, so their grades are independent. Use simulation to estimate the probability that all five get a C or better in the course. (Simulate 20 repetitions.)

Exercise 19.7

Course grades. Choose a student at random from all who took beginning statistics at Upper Wabash Tech in recent years. The probabilities for the student’s grade are

(a) What must be the probability of getting a D or an F?

(b) To simulate the grades of randomly chosen students, how would you assign digits to represent the four possible outcomes listed?

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