Basic Math Examples

$64$ , $64$ , $68$ , $73$ , $76$ , $78$ , $80$ , $86$ , $88$ , $90$ , $93$

Step 1

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

$\frac{64 + 64 + 68 + 73 + 76 + 78 + 80 + 86 + 88 + 90 + 93}{11}$

Step 2

Simplify the numerator.

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Step 2.1

Add $64$ and $64$ .

$\frac{128 + 68 + 73 + 76 + 78 + 80 + 86 + 88 + 90 + 93}{11}$

Step 2.2

Add $128$ and $68$ .

$\frac{196 + 73 + 76 + 78 + 80 + 86 + 88 + 90 + 93}{11}$

Step 2.3

Add $196$ and $73$ .

$\frac{269 + 76 + 78 + 80 + 86 + 88 + 90 + 93}{11}$

Step 2.4

Add $269$ and $76$ .

$\frac{345 + 78 + 80 + 86 + 88 + 90 + 93}{11}$

Step 2.5

Add $345$ and $78$ .

$\frac{423 + 80 + 86 + 88 + 90 + 93}{11}$

Step 2.6

Add $423$ and $80$ .

$\frac{503 + 86 + 88 + 90 + 93}{11}$

Step 2.7

Add $503$ and $86$ .

$\frac{589 + 88 + 90 + 93}{11}$

Step 2.8

Add $589$ and $88$ .

$\frac{677 + 90 + 93}{11}$

Step 2.9

Add $677$ and $90$ .

$\frac{767 + 93}{11}$

Step 2.10

Add $767$ and $93$ .

$\frac{860}{11}$

Step 3

Divide.

$78.\overline{18}$

Step 4

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.

$78.2$