Mario's weekly poker winnings have a mean of 323 dollars and a standard deviation of 50 dollars. Last week he won 177 dollars. How many standard deviations from the mean is that? A) 2.92 standard deviations above the mean B) 2.92 standard deviations below the mean C) 1.46 standard deviations below the mean D) 1.46 standard deviations above the mean

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