Standard deviation

Could you please provide step-by-step explanation for the answers of the following questions. Mrs . Smith’s reading class can read an average of 175 words per minute with a standard deviation of 20 words per minute . The top 396 of the class is to receive a special award . What is the minimum number of words per minute a student would need to read in order to get the award ? Assume the data is normally distributedAns213

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