Will fan and give a medal... please help?? (:

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

0.022

0.477

0.50

0.522

Question

Will fan and give a medal... please help?? (: 


The grades on the last history exam had a mean of 80%. Assume the population of grades on history exams is known to be normally distributed with a standard deviation of 5. What percent of students earn a score between 70% and 80%?

0.022

0.477

0.50

0.522

anonymous · Answer

No calculations necessary on this one.
Look at what we're finding pictorially here

anonymous · Answer

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