Pre-Algebra Examples

Find the Mean 3 , 12 , 16 , 4 , 2 , 7 , 20
, , , , , ,
Step 1
The mean of a set of numbers is the sum divided by the number of terms.
Step 2
Simplify the numerator.
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Step 2.1
Add and .
Step 2.2
Add and .
Step 2.3
Add and .
Step 2.4
Add and .
Step 2.5
Add and .
Step 2.6
Add and .
Step 3
Divide.
Step 4
The mean should be rounded to one more decimal place than the original data. If the original data were mixed, round to one decimal place more than the least precise.