Mean is just another name for average.
The MEAN of data is found by adding all the numbers in the data set then dividing the number of how many values you added.
Example:
6,4,10,3,7
6 + 4 + 10 + 3 + 7 = 30
30/5 = 6
Answer: 6
I'm pretty sure you ment median.
But the MEDIAN is the the middle number when the values are set from least to greatest.
Example:
1,3,3,6,7,8,9
The middle number is 6.
Or
1,2,3,4,5,6,7,9
Because there is no specific middle number, it's 4 and 5. So the answer is between those two, which is 4.5
The MODE is the number that most occurres in the set of data.
Example:
4,3,5,7,5,3,9,1,5,2
Number 5 most occurred in this set of data.
Hope this helps you out! ;)