Scores on a class exam follow a normal distribution with an average of 75 and a standard deviation of 10. A grade of B is to be awarded to students that have scores are within 1.0 to 1.5 standard deviations above the mean. Calculate the probability that a randomly selected student in this class will earn a grade of B in this class. Select the answer that is closest to your calculation

8%

9%

10%

7%

6%