In a class of 30 students, the scores on a test range from 0 to 100. If a student's score is at the 80th percentile, what is the minimum number of students who scored lower than this student?

✓ Correct Answer: Option A

The 80th percentile means 80% of the scores are at or below this student's score. For 30 students, 0.80 * 30 = 24 students scored at or below this student. This student is one of those 24. Thus, at least 24 - 1 = 23 students scored strictly lower than this student.