Basic Math Examples

$73$ , $68$ , $75$ , $82$ , $69$ , $85$ , $75$ , $78$ , $75$ , $88$ , $78$

Step 1

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

$\frac{73 + 68 + 75 + 82 + 69 + 85 + 75 + 78 + 75 + 88 + 78}{11}$

Step 2

Simplify the numerator.

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Step 2.1

Add $73$ and $68$ .

$\frac{141 + 75 + 82 + 69 + 85 + 75 + 78 + 75 + 88 + 78}{11}$

Step 2.2

Add $141$ and $75$ .

$\frac{216 + 82 + 69 + 85 + 75 + 78 + 75 + 88 + 78}{11}$

Step 2.3

Add $216$ and $82$ .

$\frac{298 + 69 + 85 + 75 + 78 + 75 + 88 + 78}{11}$

Step 2.4

Add $298$ and $69$ .

$\frac{367 + 85 + 75 + 78 + 75 + 88 + 78}{11}$

Step 2.5

Add $367$ and $85$ .

$\frac{452 + 75 + 78 + 75 + 88 + 78}{11}$

Step 2.6

Add $452$ and $75$ .

$\frac{527 + 78 + 75 + 88 + 78}{11}$

Step 2.7

Add $527$ and $78$ .

$\frac{605 + 75 + 88 + 78}{11}$

Step 2.8

Add $605$ and $75$ .

$\frac{680 + 88 + 78}{11}$

Step 2.9

Add $680$ and $88$ .

$\frac{768 + 78}{11}$

Step 2.10

Add $768$ and $78$ .

$\frac{846}{11}$

Step 3

Divide.

$76.\overline{90}$

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.

$76.9$