Basic Math Examples

$83$ , $85$ , $71$ , $73$ , $76$ , $69$ , $87$ , $76$ , $75$ , $70$ , $75$ , $80$ , $82$ , $91$ , $77$

Step 1

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

$\frac{83 + 85 + 71 + 73 + 76 + 69 + 87 + 76 + 75 + 70 + 75 + 80 + 82 + 91 + 77}{15}$

Step 2

Simplify the numerator.

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Step 2.1

Add $83$ and $85$ .

$\frac{168 + 71 + 73 + 76 + 69 + 87 + 76 + 75 + 70 + 75 + 80 + 82 + 91 + 77}{15}$

Step 2.2

Add $168$ and $71$ .

$\frac{239 + 73 + 76 + 69 + 87 + 76 + 75 + 70 + 75 + 80 + 82 + 91 + 77}{15}$

Step 2.3

Add $239$ and $73$ .

$\frac{312 + 76 + 69 + 87 + 76 + 75 + 70 + 75 + 80 + 82 + 91 + 77}{15}$

Step 2.4

Add $312$ and $76$ .

$\frac{388 + 69 + 87 + 76 + 75 + 70 + 75 + 80 + 82 + 91 + 77}{15}$

Step 2.5

Add $388$ and $69$ .

$\frac{457 + 87 + 76 + 75 + 70 + 75 + 80 + 82 + 91 + 77}{15}$

Step 2.6

Add $457$ and $87$ .

$\frac{544 + 76 + 75 + 70 + 75 + 80 + 82 + 91 + 77}{15}$

Step 2.7

Add $544$ and $76$ .

$\frac{620 + 75 + 70 + 75 + 80 + 82 + 91 + 77}{15}$

Step 2.8

Add $620$ and $75$ .

$\frac{695 + 70 + 75 + 80 + 82 + 91 + 77}{15}$

Step 2.9

Add $695$ and $70$ .

$\frac{765 + 75 + 80 + 82 + 91 + 77}{15}$

Step 2.10

Add $765$ and $75$ .

$\frac{840 + 80 + 82 + 91 + 77}{15}$

Step 2.11

Add $840$ and $80$ .

$\frac{920 + 82 + 91 + 77}{15}$

Step 2.12

Add $920$ and $82$ .

$\frac{1002 + 91 + 77}{15}$

Step 2.13

Add $1002$ and $91$ .

$\frac{1093 + 77}{15}$

Step 2.14

Add $1093$ and $77$ .

$\frac{1170}{15}$

Step 3

Divide $1170$ by $15$ .

$78$