Final answer:
Al's score on the third test is also 80, because the total points for all three tests were 240 and he scored a total of 160 on the first two tests.
Step-by-step explanation:
To solve for Al's score on the third test, we need to use the information that the average score on his first two tests was 80. If the average after three tests remained at 80, then the total points Al scored on three tests is 3 times 80, which is 240.
Since the average of his scores on the first two tests was also 80, the combined score for the first two tests is 2 times 80, equaling 160. Therefore, to find out Al's score on the third test, we subtract the total points from the first two tests from the overall total, which is 240 - 160 = 80.
Thus, the score on the third test is also 80, maintaining the average. This kind of problem is a typical average calculation question, where you need to find the missing value that will keep the overall average consistent.