m, e, a, n, left parenthesis, 40, comma, 45, comma, 56, right parenthesis

mean(40,45,56)

Evaluate

47

Factor

47

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40+45+56=141

To find the mean of the set 40,45,56 first add the members together.

\frac{141}{3}=47

The mean (average) of the set 40,45,56 is found by dividing the sum of its members by the number of the members, in this case 3.