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%

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

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.

$79500

step-by-step explanation: