The grades received by 300 students follow a normal

Last updated: 7/10/2022

The grades received by 300 students follow a normal distribution. The mean of the grades is 75%, and the standard deviation is 8%. (6 points: 2 points for correct drawing, 2 points for work, 1 point for each correct answer) a. How many students received a grade greater than 75%? b. How many students received a grade higher than 91%?