Harry's scores for 6 tests are shown in the table. Find this average score.
Tests | 1st | 2nd | 3rd | 4th | 5th | 6th |
Scores | 10 | 18 | 1 | 12 | 9 | 13 |
Tests | 1st | 2nd | 3rd | 4th | 5th | 6th |
Scores | 10 | 18 | 1 | 12 | 9 | 13 |
Tests | 1st | 2nd | 3rd | 4th | 5th | 6th |
Scores | 10 | 18 | 1 | 12 | 9 | 13 |
Tests | 1st | 2nd | 3rd | 4th | 5th | 6th |
Scores | 10 | 18 | 1 | 12 | 9 | 13 |
Tests | 1st | 2nd | 3rd | 4th | 5th | 6th |
Scores | 10 | 18 | 1 | 12 | 9 | 13 |