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The average score for a Biology test is 77 and the standard deviation is 8. Which percent best represents the probability that any one student

The average score for a Biology test is 77 and the standard deviation is 8. Which percent best represents the probability that any one student scored between 61 and 93 on the test?

[1] 99.5% [2] 95% [3] 68% [4] 34%

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