Let's say you take an exam worth 240 points and your score marked the 78th percentile of all the exam scores. Based on this you can conclude that % of exam takers had scores equal to or better than yours.

Here, we are required to determine what percentage of exam takers had scores equal to or better than mine.

The correct answer is therefore, 22%

First, a percentile is a statistical term used to represent each of the 100 equal groups into which a population can be divided according to the distribution of values of a particular variable, (in this case the scores).

Therefore, according to the definition above, Since my score marked the 78th percentile, we can conclude that only (100 - 78)% of the exam takers had scores equal to or better than mine.

The correct answer is therefore, 22%

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28%

Step-by-step explanation:

78th percentile means 78% scored less than/equal to you.

100 - 78 = 22%