Basic Math Examples

$1.9$ , $5.1$ , $6.4$ , $8.1$ , $4.9$ , $2.9$ , $4.9$

Step 1

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

$\frac{1.9 + 5.1 + 6.4 + 8.1 + 4.9 + 2.9 + 4.9}{7}$

Step 2

Simplify the numerator.

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Step 2.1

Add $1.9$ and $5.1$ .

$\frac{7 + 6.4 + 8.1 + 4.9 + 2.9 + 4.9}{7}$

Step 2.2

Add $7$ and $6.4$ .

$\frac{13.4 + 8.1 + 4.9 + 2.9 + 4.9}{7}$

Step 2.3

Add $13.4$ and $8.1$ .

$\frac{21.5 + 4.9 + 2.9 + 4.9}{7}$

Step 2.4

Add $21.5$ and $4.9$ .

$\frac{26.4 + 2.9 + 4.9}{7}$

Step 2.5

Add $26.4$ and $2.9$ .

$\frac{29.3 + 4.9}{7}$

Step 2.6

Add $29.3$ and $4.9$ .

$\frac{34.2}{7}$

Step 3

Divide $34.2$ by $7$ .

$4.8\overline{857142}$

Step 4

Divide.

$4.88571428$

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.

$4.89$