GMAT 考满分题库

- 数学PS -
There are now 1,000 students, whose average grade is 5 and the standard deviation is 1. So how many students have a grade greater than 4. (68% of the distribution lies within 1 standard deviation of the mean.)
  • A560
  • B600
  • C640
  • D700
  • E840
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正确答案: E

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