Question: 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
Grade: A B C D or F
Probability: 0.3 0.3 0.3 ?
(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?