calculate the score for two test combined total 80% is A

1st test I got 10/10 and that worth 10%
second exam I got 15/20 that worth 20%
the semester worth 30% in total can this student ahceive 80%

To calculate the total score achieved by the student, we first need to convert the scores for the two tests into a percentage:

1st Test: 10/10 = (10/10) * 10% = 100%
2nd Test: 15/20 = (15/20) * 20% = 75%

Now, we add these percentages together to get the total score:

100% (1st Test) + 75% (2nd Test) = 175%

Since the semester is worth 30% and the total score achieved by the student is 175%, we multiply the semester score percentage by 30%:

175% * 0.3 = 52.5%

Now, we add this semester score to the total score achieved by the student:

175% (total score) + 52.5% (semester score) = 227.5%

Since the maximum possible score is 80%, the student cannot achieve 80% with the given scores.