9. Fifty percent of the students enrolled in a business statistics course had previously taken a finite mathematics course. Thirty percent of these students received an A for the statistics course, whereas 20% of the other students received an A for the statistics course. a. Draw a tree diagram and label it with the appropriate probabilities. b. What is the probability that a student selected at random previously took a finite mathematic course and did not receive an A in the statistics course? C. What is the probability that a student selected at random received an A in the statistics cours

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