Statistics

If the mean of $$ 3, 4, 9, 2k, 10, 8, 6 $$ and $$ (k + 6) $$ is 8, and the mode of $$ 2, 2, 3, 2p, (2p + 1), 4, 4, 5 $$...

Find the mean of the following frequency distribution: | Scores | 5 | 6 | 7 | 8 | 9 | |------------|-----...