Basic Math Examples

76

$76$ ,

88

$88$ ,

80

$80$ ,

70

$70$ ,

70

$70$ ,

90

$90$ ,

85

$85$ ,

86

$86$ ,

75

$75$ ,

92

$92$

Step 1

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

\frac{76 + 88 + 80 + 70 + 70 + 90 + 85 + 86 + 75 + 92}{10}

$\frac{76 + 88 + 80 + 70 + 70 + 90 + 85 + 86 + 75 + 92}{10}$

Step 2

Simplify the numerator.

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Step 2.1

Add

76

$76$ and

88

$88$ .

\frac{164 + 80 + 70 + 70 + 90 + 85 + 86 + 75 + 92}{10}

$\frac{164 + 80 + 70 + 70 + 90 + 85 + 86 + 75 + 92}{10}$

Step 2.2

Add

164

$164$ and

80

$80$ .

\frac{244 + 70 + 70 + 90 + 85 + 86 + 75 + 92}{10}

$\frac{244 + 70 + 70 + 90 + 85 + 86 + 75 + 92}{10}$

Step 2.3

Add

244

$244$ and

70

$70$ .

\frac{314 + 70 + 90 + 85 + 86 + 75 + 92}{10}

$\frac{314 + 70 + 90 + 85 + 86 + 75 + 92}{10}$

Step 2.4

Add

314

$314$ and

70

$70$ .

\frac{384 + 90 + 85 + 86 + 75 + 92}{10}

$\frac{384 + 90 + 85 + 86 + 75 + 92}{10}$

Step 2.5

Add

384

$384$ and

90

$90$ .

\frac{474 + 85 + 86 + 75 + 92}{10}

$\frac{474 + 85 + 86 + 75 + 92}{10}$

Step 2.6

Add

474

$474$ and

85

$85$ .

\frac{559 + 86 + 75 + 92}{10}

$\frac{559 + 86 + 75 + 92}{10}$

Step 2.7

Add

559

$559$ and

86

$86$ .

\frac{645 + 75 + 92}{10}

$\frac{645 + 75 + 92}{10}$

Step 2.8

Add

645

$645$ and

75

$75$ .

\frac{720 + 92}{10}

$\frac{720 + 92}{10}$

Step 2.9

Add

720

$720$ and

92

$92$ .

\frac{812}{10}

$\frac{812}{10}$

\frac{812}{10}

$\frac{812}{10}$

Step 3

Cancel the common factor of

812

$812$ and

10

$10$ .

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Step 3.1

Factor

2

$2$ out of

812

$812$ .

\frac{2 (406)}{10}

$\frac{2 (406)}{10}$

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 406}{2 \cdot 5}

$\frac{2 \cdot 406}{2 \cdot 5}$

Step 3.2.2

Cancel the common factor.

$\frac{2 \cdot 406}{2 \cdot 5}$

Step 3.2.3

Rewrite the expression.

$\frac{406}{5}$

Step 4

Divide.

$81.2$