Basic Math Examples

A random sample of $9$ humms students gots a score $23$ , $27$ , $30$ , $32$ , $15$ , $33$ , $45$ , $37$ , and $24$

Step 1

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

$\frac{9 + 23 + 27 + 30 + 32 + 15 + 33 + 45 + 37 + 24}{10}$

Step 2

Simplify the numerator.

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Step 2.1

Add $9$ and $23$ .

$\frac{32 + 27 + 30 + 32 + 15 + 33 + 45 + 37 + 24}{10}$

Step 2.2

Add $32$ and $27$ .

$\frac{59 + 30 + 32 + 15 + 33 + 45 + 37 + 24}{10}$

Step 2.3

Add $59$ and $30$ .

$\frac{89 + 32 + 15 + 33 + 45 + 37 + 24}{10}$

Step 2.4

Add $89$ and $32$ .

$\frac{121 + 15 + 33 + 45 + 37 + 24}{10}$

Step 2.5

Add $121$ and $15$ .

$\frac{136 + 33 + 45 + 37 + 24}{10}$

Step 2.6

Add $136$ and $33$ .

$\frac{169 + 45 + 37 + 24}{10}$

Step 2.7

Add $169$ and $45$ .

$\frac{214 + 37 + 24}{10}$

Step 2.8

Add $214$ and $37$ .

$\frac{251 + 24}{10}$

Step 2.9

Add $251$ and $24$ .

$\frac{275}{10}$

Step 3

Cancel the common factor of $275$ and $10$ .

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Step 3.1

Factor $5$ out of $275$ .

$\frac{5 (55)}{10}$

Step 3.2

Cancel the common factors.

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Step 3.2.1

Factor $5$ out of $10$ .

$\frac{5 \cdot 55}{5 \cdot 2}$

Step 3.2.2

Cancel the common factor.

$\frac{5 \cdot 55}{5 \cdot 2}$

Step 3.2.3

Rewrite the expression.

$\frac{55}{2}$

Step 4

Divide.

$27.5$