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Mathematics 11 Online
OpenStudy (anonymous):

About 55% of emergency room visits are unnecessary. Assuming each emergency room visit is independent. (Hints: first define the random variable X. Then write the objective of each question in terms of X.) a. Suppose the distribution of unnecessary emergency room visits can be approximated by a normal distribution. What is the probability that AT LEAST two of them need to be in the emergency room? @terenzreignz

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