If the mean of 15, x, 17 and 12 is 15, what is the median of these four values?
Correct Answer: D.15.5
If the mean of 15, x, 17 and 12 is 15, then
If the four values are arranged in ascending order (a descending order will also work), we have,
For an odd number of values, the one right in the middle would be the median. In this case, there is an even number of values; so we take the mean of the two values in the middle, i.e. of 15 an 16, which is 15.5.
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The Dental Admission Test (DAT) is a test administered by the American Dental Association (ADA). The test is four hours and 30 minutes long and contains four sections. The test is designed to assess your knowledge in: biology, chemistry, organic chemistry, perceptual ability, reading comprehension, and basic math.
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