whats the mean of 1 2 3 6 7 9

Either 3 or 6, I think. 

The answer 4.6666

Mean  =   [ Sum of the numbers ] /  [ The number of data values ]   =

[ 1 + 2 + 3 + 6 + 7 + 9 ]  /  6     =

[28 ] / 6   =

14 / 3 =

4 + 2/3    =   4.6666.....