the mean is all the numbers added divided by the number of well, number
ex: 2,1,3 would be 6 divided by 3 separate numbers= 2
the median is the middle number when all the numbers are arranged in order
ex: 2,1,3 would be 123= 2
the mode is the number that occurs most often
ex: 47297 would be 2,4,7,7,9 and the mode is 7 since it occurred twice