312

A mixed number is an addition of its whole and fractional parts.

3+12

Add 3 and 12.

To write 3 as a fraction with a common denominator, multiply by 22.

3⋅22+12

Combine 3 and 22.

3⋅22+12

Combine the numerators over the common denominator.

3⋅2+12

Simplify the numerator.

Multiply 3 by 2.

6+12

Add 6 and 1.

72

72

72

72

The mean of a set of numbers is the sum divided by the number of terms.

721

Divide 72 by 1.

72

Divide.

3.5

Find the Mean (Arithmetic) 3 1/2