Alicia received the following seven scores on her math assignments. 80, 90, 10, 75, 90, 95, 99Find the mean and median. Which measure of center best represents the data?

The mean is (80 + 90 + 10 + 75 + 90 + 95 + 99) ÷ 7 = 539 ÷ 7 = 77. In order, the scores are 10, 75, 80, 90, 90, 95, 99, so the median is 90. The score of 10 is much lower than the others and pulls the mean down, so the median best represents the data. The correct choice is B, the median.

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