3215+815

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

3+215+815

Add 3 and 215.

To write 3 as a fraction with a common denominator, multiply by 1515.

3⋅1515+215+815

Combine 3 and 1515.

3⋅1515+215+815

Combine the numerators over the common denominator.

3⋅15+215+815

Simplify the numerator.

Multiply 3 by 15.

45+215+815

Add 45 and 2.

4715+815

4715+815

4715+815

4715+815

Combine the numerators over the common denominator.

47+815

Add 47 and 8.

5515

Factor 5 out of 55.

5(11)15

Cancel the common factors.

Factor 5 out of 15.

5⋅115⋅3

Cancel the common factor.

5⋅115⋅3

Rewrite the expression.

113

113

113

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

1131

Divide 113 by 1.

113

Divide.

3.6‾

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.

3.7

Find the Mean (Arithmetic) 3 2/15+8/15