Answer:
25%
Explanation:
In a box and whisker plot, 25% of the data is between the left dot and the left end of the box, 25% is between the left end of the box and the bar in the middle of the box, 25 % is between the bar and the right end of the box, and 25 % from the right end of the box and the final dot on the right whisker.
We want to know how many teachers have more than 11 years, or how many are between the right end of the box and the dot and the right whisker. That would be 25%