Question

What is the mean, median, and mode of 31, 28, 30, 31, 30?

Answer 1

Mean `=30`
Median `=30`
Mode `=30, 31`

Explanation:

The mean is the "average" - the sum of the values divided by the count of the values:

`(31+28+30+31+30)/5=150/5=30`

The median is the middle value in a string of values listed from lowest to highest (or highest to lowest - they just can't be scrambled up):

`28,30,30,31,31`

median `=30`

The mode is the value that is listed most often. In this case, both the 30 and 31 are listed twice, so they are both the mode.