Find the mean of the following data
28,48,55,23,43,7,22,16,24,35,28,19
a) 28
b) 29
c) 48
d) 26

Solutions 

The mean is the average of the numbers. You find the mean by adding the numbers together and then dividing by the number of numbers in the group. 

First, count how many numbers are in the group. 



There are 12 numbers.
Now add all the numbers together: 

 

= 348 

Now divide the sum by the number of numbers: 

 

= 29  

Answer = (b)