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# A middleschool principl has a 100 eighth grade students taking a standardized test with a mean equal to 400 with a standard deviation of 70. The...

A middleschool principl has a 100 eighth grade students taking a standardized test with a mean equal to 400 with a standard deviation of 70. The scores are normally distributed. What is the probability that the group of 100 students will have a mean score below 385? Use te z-score table.