Basic Math Examples

$12$ , $15$ , $45$ , $65$ , $78$

Step 1

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

$\frac{12 + 15 + 45 + 65 + 78}{5}$

Step 2

Simplify the numerator.

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Step 2.1

Add $12$ and $15$ .

$\frac{27 + 45 + 65 + 78}{5}$

Step 2.2

Add $27$ and $45$ .

$\frac{72 + 65 + 78}{5}$

Step 2.3

Add $72$ and $65$ .

$\frac{137 + 78}{5}$

Step 2.4

Add $137$ and $78$ .

$\frac{215}{5}$

Step 3

Divide $215$ by $5$ .

$43$

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