Basic Math Examples

$17$ , $25$ , $28$ , $11$ , $13$ , $31$ , $41$ , $31$ , $35$ , $27$ , $20$ , $19$ , $19$ , $14$ , $36$ , $24$ , $26$ , $25$ , $30$ , $20$ , $22$ , $70$ , $35$ , $25$ , $27$ , $9$ , $45$

Step 1

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

$\frac{17 + 25 + 28 + 11 + 13 + 31 + 41 + 31 + 35 + 27 + 20 + 19 + 19 + 14 + 36 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2

Simplify the numerator.

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Step 2.1

Add $17$ and $25$ .

$\frac{42 + 28 + 11 + 13 + 31 + 41 + 31 + 35 + 27 + 20 + 19 + 19 + 14 + 36 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.2

Add $42$ and $28$ .

$\frac{70 + 11 + 13 + 31 + 41 + 31 + 35 + 27 + 20 + 19 + 19 + 14 + 36 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.3

Add $70$ and $11$ .

$\frac{81 + 13 + 31 + 41 + 31 + 35 + 27 + 20 + 19 + 19 + 14 + 36 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.4

Add $81$ and $13$ .

$\frac{94 + 31 + 41 + 31 + 35 + 27 + 20 + 19 + 19 + 14 + 36 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.5

Add $94$ and $31$ .

$\frac{125 + 41 + 31 + 35 + 27 + 20 + 19 + 19 + 14 + 36 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.6

Add $125$ and $41$ .

$\frac{166 + 31 + 35 + 27 + 20 + 19 + 19 + 14 + 36 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.7

Add $166$ and $31$ .

$\frac{197 + 35 + 27 + 20 + 19 + 19 + 14 + 36 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.8

Add $197$ and $35$ .

$\frac{232 + 27 + 20 + 19 + 19 + 14 + 36 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.9

Add $232$ and $27$ .

$\frac{259 + 20 + 19 + 19 + 14 + 36 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.10

Add $259$ and $20$ .

$\frac{279 + 19 + 19 + 14 + 36 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.11

Add $279$ and $19$ .

$\frac{298 + 19 + 14 + 36 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.12

Add $298$ and $19$ .

$\frac{317 + 14 + 36 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.13

Add $317$ and $14$ .

$\frac{331 + 36 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.14

Add $331$ and $36$ .

$\frac{367 + 24 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.15

Add $367$ and $24$ .

$\frac{391 + 26 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.16

Add $391$ and $26$ .

$\frac{417 + 25 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.17

Add $417$ and $25$ .

$\frac{442 + 30 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.18

Add $442$ and $30$ .

$\frac{472 + 20 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.19

Add $472$ and $20$ .

$\frac{492 + 22 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.20

Add $492$ and $22$ .

$\frac{514 + 70 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.21

Add $514$ and $70$ .

$\frac{584 + 35 + 25 + 27 + 9 + 45}{27}$

Step 2.22

Add $584$ and $35$ .

$\frac{619 + 25 + 27 + 9 + 45}{27}$

Step 2.23

Add $619$ and $25$ .

$\frac{644 + 27 + 9 + 45}{27}$

Step 2.24

Add $644$ and $27$ .

$\frac{671 + 9 + 45}{27}$

Step 2.25

Add $671$ and $9$ .

$\frac{680 + 45}{27}$

Step 2.26

Add $680$ and $45$ .

$\frac{725}{27}$

Step 3

Divide.

$26.\overline{851}$

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.

$26.9$