In a study of cystatin C levels among 10,000 people, the data was determined to be normally distribu with a mean value of 3.0 mg/L and a standard deviation of 0.5 mg/L. Approximately how many of study participants in the study are expected to have cystatin C level greater than 4.0 mg/L? A. 100 B. 250 C. 500 D. 1000

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