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The average number of calories in a 1.5 ounce chocolate bar is 225.3 with standard deviation...

The average number of calories in a 1.5 ounce chocolate bar is 225.3 with standard deviation of 9.8 calories. The distribution of calories are approximately normal. Select 14 chocolate bars at random, What is the probability that a random sample of 14 chocolate bars will result in a sample mean less than 240 calories?
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