9514 1404 393
Answer:
82
Step-by-step explanation:
The differences between the current scores and the desired mean are ...
0, -1, +7, -15, +4
for a total of -5.
To achieve a mean of 77 after his next test, Manuel needs to bring the total of differences to 0. That is, he must score 5 points above that mean: 77 + 5 = 82.
Manuel needs a score of 82.
