Lee's scores for 4 tests are shown in the table. Find this average score.
Tests | 1st | 2nd | 3rd | 4th |
Scores | 0 | 11 | 20 | 7 |
Tests | 1st | 2nd | 3rd | 4th |
Scores | 0 | 11 | 20 | 7 |
Tests | 1st | 2nd | 3rd | 4th |
Scores | 0 | 11 | 20 | 7 |
Tests | 1st | 2nd | 3rd | 4th |
Scores | 0 | 11 | 20 | 7 |
Tests | 1st | 2nd | 3rd | 4th |
Scores | 0 | 11 | 20 | 7 |