Answer :
Final answer:
To find the average (mean) of the test scores, add all the scores and then divide by the number of scores. The mean of the given test scores is 76, which is option A.
Explanation:
Mean Calculation:
Add all the test scores: 83 + 92 + 47 + 78 + 80 = 380.
Divide the sum by the number of scores: 380 / 5 = 76.
Therefore, the mean (average) of the given test scores is 76.
