Basic Math Examples

$1.5$ , $4.7$ , $6$ , $7.7$ , $7.7$ , $4.5$ , $2.5$ , $4.5$

Step 1

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

$\frac{1.5 + 4.7 + 6 + 7.7 + 7.7 + 4.5 + 2.5 + 4.5}{8}$

Step 2

Simplify the numerator.

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Step 2.1

Add $1.5$ and $4.7$ .

$\frac{6.2 + 6 + 7.7 + 7.7 + 4.5 + 2.5 + 4.5}{8}$

Step 2.2

Add $6.2$ and $6$ .

$\frac{12.2 + 7.7 + 7.7 + 4.5 + 2.5 + 4.5}{8}$

Step 2.3

Add $12.2$ and $7.7$ .

$\frac{19.9 + 7.7 + 4.5 + 2.5 + 4.5}{8}$

Step 2.4

Add $19.9$ and $7.7$ .

$\frac{27.6 + 4.5 + 2.5 + 4.5}{8}$

Step 2.5

Add $27.6$ and $4.5$ .

$\frac{32.1 + 2.5 + 4.5}{8}$

Step 2.6

Add $32.1$ and $2.5$ .

$\frac{34.6 + 4.5}{8}$

Step 2.7

Add $34.6$ and $4.5$ .

$\frac{39.1}{8}$

Step 3

Divide $39.1$ by $8$ .

$4.8875$

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.

$4.9$