Basic Math Examples

$79$ , $80$ , $72$ , $63$ , $94$ , $90$

Step 1

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

$\frac{79 + 80 + 72 + 63 + 94 + 90}{6}$

Step 2

Simplify the numerator.

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Step 2.1

Add $79$ and $80$ .

$\frac{159 + 72 + 63 + 94 + 90}{6}$

Step 2.2

Add $159$ and $72$ .

$\frac{231 + 63 + 94 + 90}{6}$

Step 2.3

Add $231$ and $63$ .

$\frac{294 + 94 + 90}{6}$

Step 2.4

Add $294$ and $94$ .

$\frac{388 + 90}{6}$

Step 2.5

Add $388$ and $90$ .

$\frac{478}{6}$

Step 3

Cancel the common factor of $478$ and $6$ .

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Step 3.1

Factor $2$ out of $478$ .

$\frac{2 (239)}{6}$

Step 3.2

Cancel the common factors.

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Step 3.2.1

Factor $2$ out of $6$ .

$\frac{2 \cdot 239}{2 \cdot 3}$

Step 3.2.2

Cancel the common factor.

$\frac{2 \cdot 239}{2 \cdot 3}$

Step 3.2.3

Rewrite the expression.

$\frac{239}{3}$

Step 4

Divide.

$79.\overline{6}$

Step 5

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.

$79.7$