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The exam scores of 100 students in an exam has a mean of 40 and a standard deviation of 5. By the Chebyshev's rule, at
The exam scores of 100 students in an exam has a mean of 40 and a standard deviation of 5. By the Chebyshev's rule, at least 75% of the students have scores between which two values?
- 30 and 50
- 20 and 60
- 25 and 55
- 35 and 45
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