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The grades on the last history exam had a mean of 80%. Assume the population of grades on history exams is known to be distributed normally, with a standard deviation of 5%. Approximately what percent of students earn a score between 70% and 80%?

A. 2.2%
B. 10%
C. 47.7%
D. 50%
E. 52.5%

Respuesta :

Answer:

I got C because A and B are too small for the standard division to be a mean of 80% and the number also cannot be 50% or higher because it could bring the median lower and or higher

Answer:

47.7%

Step-by-step explanation:

i got it right on a test

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