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What must be the probability of getting a d or an f

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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?

Reference no: EM131639340

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