Final answer:
To find the mean (average) score, add up all the scores and divide by the number of scores.
Step-by-step explanation:
To find the mean (average) score, you need to add up all the scores and divide by the number of scores. In this case, the sum of the scores is 9.25 + 9.25 + 9.75 + 10.25 + 10.75 + 10.75 + 11.25 + 11.75 + 11.75 + 11.75 = 107.25. Since there are 10 dancers, you divide the sum by 10 to get the average: 107.25 ÷ 10 = 10.725.