Find the Mean 81 , 85 , 82 , 93 , 85 , 84 , 95 , 87 , 88 , 91

$81$ , $85$ , $82$ , $93$ , $85$ , $84$ , $95$ , $87$ , $88$ , $91$

Step 1

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

$\frac{81 + 85 + 82 + 93 + 85 + 84 + 95 + 87 + 88 + 91}{10}$

Step 2

Simplify the numerator.

Add $81$ and $85$ .

$\frac{166 + 82 + 93 + 85 + 84 + 95 + 87 + 88 + 91}{10}$

Add $166$ and $82$ .

$\frac{248 + 93 + 85 + 84 + 95 + 87 + 88 + 91}{10}$

Add $248$ and $93$ .

$\frac{341 + 85 + 84 + 95 + 87 + 88 + 91}{10}$

Add $341$ and $85$ .

$\frac{426 + 84 + 95 + 87 + 88 + 91}{10}$

Add $426$ and $84$ .

$\frac{510 + 95 + 87 + 88 + 91}{10}$

Add $510$ and $95$ .

$\frac{605 + 87 + 88 + 91}{10}$

Add $605$ and $87$ .

$\frac{692 + 88 + 91}{10}$

Add $692$ and $88$ .

$\frac{780 + 91}{10}$

Add $780$ and $91$ .

$\frac{871}{10}$

Step 3

Divide.

$87.1$