Answer:
2
Step-by-step explanation:
Arranging them in ascending order we have the scores as;
[tex]2, 3, 3, 4, 4, 6, 8, 9, 9, 9[/tex]
The median is the average of the 5th and 6th scores.
[tex] \frac{4 + 6}{2} \\ \frac{10}{2} \\ 5[/tex]
The new set of scores become
[tex]2,3,3,4,6,8,9,9,9,9[/tex]
The median is;
[tex] \frac{6 + 8}{2} \\ \frac{14}{2} \\ 7[/tex]
The difference is
[tex]7 - 5 = 2[/tex]
Hope it helps! Vote for brainliest!