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Question 7 (4 marks): In a set of 10 items coming out of a manufacturing process, two items are defective (D), and the remaining eight are good (G). A quality control inspector randomly selects three of the ten items without replacement, and classies each as defective or good. a. (2 marks) Calculate the probability that the rst selected item is good. b. (2 marks) Calculate the probability that at least two items are good