Answer:
For which class should Sara expect the better grade?
C. Math
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
For this case we can use the z score formula in order to find the position and the probability would represent the percentile for each case.
Math Exam



So the score is on the 99 percentile approximated.
Spanish Exam



So the score is on the 84 percentile approximated.
So we can see that the percentile is higher for the Math class so then the best answer would be:
For which class should Sara expect the better grade?
C. Math