112⋅5 , 400

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

(1+12)⋅5,400

Add 1 and 12.

Write 1 as a fraction with a common denominator.

(22+12)⋅5,400

Combine the numerators over the common denominator.

2+12⋅5,400

Add 2 and 1.

32⋅5,400

32⋅5,400

32⋅5,400

Combine 32 and 5.

3⋅52,400

Multiply 3 by 5.

152,400

152,400

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

152+4002

To write 400 as a fraction with a common denominator, multiply by 22.

152+400⋅222

Combine 400 and 22.

152+400⋅222

Combine the numerators over the common denominator.

15+400⋅222

Simplify the numerator.

Multiply 400 by 2.

15+80022

Add 15 and 800.

81522

81522

81522

Multiply the numerator by the reciprocal of the denominator.

8152⋅12

Multiply 8152 and 12.

8152⋅2

Multiply 2 by 2.

8154

8154

Divide.

203.75

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.

203.8

Find the Mean (Arithmetic) 1 1/2*5 , 400