Oscar's scores for 4 quizzes are shown in the table. Find this average score.
Quizzes | 1st | 2nd | 3rd | 4th |
Scores | 12 | 4 | 15 | 5 |
Quizzes | 1st | 2nd | 3rd | 4th |
Scores | 12 | 4 | 15 | 5 |
Quizzes | 1st | 2nd | 3rd | 4th |
Scores | 12 | 4 | 15 | 5 |
Quizzes | 1st | 2nd | 3rd | 4th |
Scores | 12 | 4 | 15 | 5 |
Quizzes | 1st | 2nd | 3rd | 4th |
Scores | 12 | 4 | 15 | 5 |