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  3. the grades received by 300 students follow a norma

The grades received by 300 students follow a normaldistribution. The mean of the grades is...

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The grades received by 300 students follow a normaldistribution. The mean of the grades is 75%, and the standarddeviation is 8%. (6 points: 2 points for correct drawing, 2 pointsfor 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%?

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