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The capacity of an office building elevator is 640 kg. (i.e. not safe if the total weight exceeds 640kg) Assume that the weights of the

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The capacity of an office building elevator is 640 kg. (i.e. not safe if the total weight exceeds 640kg) Assume that the weights of the office workers are Normally distributed with mean equal to 75 and standard deviation equal to 9 kg. What is the probability that the total weight of 8 randomly selected office workers exceeds the capacity of an elevator

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