Find the means of these numbers 3,7,2,9,4,7,3,7,5,2

The "mean" of a group of numbers is also called their "average".

To calculate the mean, add up all the numbers, then
divide the sum by the number of items on the list.

Step #1:  Addum up:  3+7+2+9+4+7+3+7+5+2 = 49

Step #2:  Count the number of items on the list:  I count 10 .

Step #3:  Divide the sum by the number of items on the list.

                 49 / 10  =  4.9

The mean (average) of the numbers on that list is  4.9 .

First to find the mean of the numbers we have to add the all up
3 + 7 + 2 + 9 + 4 + 7 + 3 + 7 + 5 + 2 = 49
Then we have to divide by how many numbers we have which is 10
49 divided by 10 equals 4.9
4.9 is the mean of the data set.