Basic Math Examples

25

$25$ ,

40

$40$ ,

68

$68$ ,

85

$85$ ,

95

$95$ ,

98

$98$ ,

70

$70$ ,

78

$78$ ,

85

$85$ ,

100

$100$

Step 1

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

\frac{25 + 40 + 68 + 85 + 95 + 98 + 70 + 78 + 85 + 100}{10}

$\frac{25 + 40 + 68 + 85 + 95 + 98 + 70 + 78 + 85 + 100}{10}$

Step 2

Simplify the numerator.

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Step 2.1

Add

25

$25$ and

40

$40$ .

\frac{65 + 68 + 85 + 95 + 98 + 70 + 78 + 85 + 100}{10}

$\frac{65 + 68 + 85 + 95 + 98 + 70 + 78 + 85 + 100}{10}$

Step 2.2

Add

65

$65$ and

68

$68$ .

\frac{133 + 85 + 95 + 98 + 70 + 78 + 85 + 100}{10}

$\frac{133 + 85 + 95 + 98 + 70 + 78 + 85 + 100}{10}$

Step 2.3

Add

133

$133$ and

85

$85$ .

\frac{218 + 95 + 98 + 70 + 78 + 85 + 100}{10}

$\frac{218 + 95 + 98 + 70 + 78 + 85 + 100}{10}$

Step 2.4

Add

218

$218$ and

95

$95$ .

\frac{313 + 98 + 70 + 78 + 85 + 100}{10}

$\frac{313 + 98 + 70 + 78 + 85 + 100}{10}$

Step 2.5

Add

313

$313$ and

98

$98$ .

\frac{411 + 70 + 78 + 85 + 100}{10}

$\frac{411 + 70 + 78 + 85 + 100}{10}$

Step 2.6

Add

411

$411$ and

70

$70$ .

\frac{481 + 78 + 85 + 100}{10}

$\frac{481 + 78 + 85 + 100}{10}$

Step 2.7

Add

481

$481$ and

78

$78$ .

\frac{559 + 85 + 100}{10}

$\frac{559 + 85 + 100}{10}$

Step 2.8

Add

559

$559$ and

85

$85$ .

\frac{644 + 100}{10}

$\frac{644 + 100}{10}$

Step 2.9

Add

644

$644$ and

100

$100$ .

\frac{744}{10}

$\frac{744}{10}$

\frac{744}{10}

$\frac{744}{10}$

Step 3

Cancel the common factor of

744

$744$ and

10

$10$ .

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Step 3.1

Factor

2

$2$ out of

744

$744$ .

\frac{2 (372)}{10}

$\frac{2 (372)}{10}$

Step 3.2

Cancel the common factors.

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Step 3.2.1

Factor

2

$2$ out of

10

$10$ .

\frac{2 \cdot 372}{2 \cdot 5}

$\frac{2 \cdot 372}{2 \cdot 5}$

Step 3.2.2

Cancel the common factor.

$\frac{2 \cdot 372}{2 \cdot 5}$

Step 3.2.3

Rewrite the expression.

$\frac{372}{5}$

Step 4

Divide.

$74.4$