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Beer bottles are filled so that they contain an average of 475 ml of beer in...

Beer bottles are filled so that they contain an average of 475 ml of beer in each bottle. Suppose that the amount of beer in a bottle is normally distributed with a standard deviation of 8 ml. a. What is the probability that a randomly selected bottle will have less than 470 ml of beer? b. What is the probability that a randomly selected 6-pack of beer will have a mean amount less than 470 ml?

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