Final answer:
The percentage of the score is calculated by dividing the score by the total possible points and multiplying by 100. In this case, the student's score of 10 out of 50 corresponds to 20%.
Step-by-step explanation:
If a student scored 10 out of 50 on a test, to find the percentage this represents, we would divide the score (10) by the total possible points (50) and then multiply by 100 to convert to a percentage.
Percentage = (Score ÷ Total Possible Points) × 100
Percentage = (10 ÷ 50) × 100
Percentage = 0.2 × 100
Percentage = 20%
Therefore, the percentage of the score is 20%, which corresponds with option (c).