A shop logged these repair counts over six days: 12, 15, 15, 18, 22, and 27. What is the median number of repairs?

Correct answer to question 44 (Arithmetic Reasoning): 16.5

Method

The median is the middle value of an ordered list. With six values there is no single middle one, so average the third and fourth: 15 and 18 give (15 + 18) divided by 2, or 16.5. The mode is 15 and the mean is 18.2, which is why both appear as choices.