Answer:

From this info and using the empirical rule we know that we will have about 68% of the scores between:


95 % of the scores between:


And 99.7% of the values between


Step-by-step explanation:
For this problem we can define the random variable of interest as "the student grades" and we know that the distribution for X is given by:

From this info and using the empirical rule we know that we will have about 68% of the scores between:


95 % of the scores between:


And 99.7% of the values between

