# Find the Mean (Arithmetic) 9 , 12 , 15 , 3 , 21 , 24 , 5 , 9 , 16 , 21

9 , 12 , 15 , 3 , 21 , 24 , 5 , 9 , 16 , 21
The mean of a set of numbers is the sum divided by the number of terms.
9+12+15+3+21+24+5+9+16+2110
Simplify the numerator.
Add 9 and 12.
21+15+3+21+24+5+9+16+2110
Add 21 and 15.
36+3+21+24+5+9+16+2110
Add 36 and 3.
39+21+24+5+9+16+2110
Add 39 and 21.
60+24+5+9+16+2110
Add 60 and 24.
84+5+9+16+2110
Add 84 and 5.
89+9+16+2110
Add 89 and 9.
98+16+2110
Add 98 and 16.
114+2110
Add 114 and 21.
13510
13510
Cancel the common factor of 135 and 10.
Factor 5 out of 135.
5(27)10
Cancel the common factors.
Factor 5 out of 10.
5⋅275⋅2
Cancel the common factor.
5⋅275⋅2
Rewrite the expression.
272
272
272
Divide.
13.5
Find the Mean (Arithmetic) 9 , 12 , 15 , 3 , 21 , 24 , 5 , 9 , 16 , 21

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