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Question 9 (10 marks). Suppose that lesions are present at 5 sites among 50 in a patient. A biopsy selects 8 sites randomly (without replacement).

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Question 9 (10 marks). Suppose that lesions are present at 5 sites among 50 in a patient. A biopsy selects 8 sites randomly (without replacement). (a) What is the probability that lesions are present in at least one selected site? (b) What is the probability that lesions are present in two or more selected sites

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