Jump rope with a double jump. As you bring the jump rope in front of you, cross your right arm over your left. For the next jump, cross your left arm over your right.

On a test the graders have a mean of 77 and a standard deviation of 8. if we can approximate the distribution of these graders by a number distribution what percent of the students. a) scores higher than 77? b) should pass the test (grades > 60)? c) should fail the test (grades < 60)?