The mean is determined by totaling the values listed then dividing by the number values given.
How much do the values add up to?
How many values are listed?
The median is determined by first putting the values listed in order from least to greatest, then finding the value in the middle of the list.
The mode is the value that occurs most often in the list.
Just look up the definitions of the terms Mean, Median, and Mode then apply them to your list of numbers. In your problem above it is only the Mean (also called the Average) that requires some work. The other two should be pretty straight forward according to the definitions of the terms. If you know how to calculate the Average then you already know how to calculate the Mean.
Give the definitions a try.
