Basic Math Examples

70

$70$ ,

68

$68$ ,

72

$72$ ,

66

$66$ ,

68

$68$ ,

69

$69$ ,

66

$66$ ,

71

$71$ ,

74

$74$ ,

66

$66$

Step 1

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

\frac{70 + 68 + 72 + 66 + 68 + 69 + 66 + 71 + 74 + 66}{10}

$\frac{70 + 68 + 72 + 66 + 68 + 69 + 66 + 71 + 74 + 66}{10}$

Step 2

Simplify the numerator.

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Step 2.1

Add

70

$70$ and

68

$68$ .

\frac{138 + 72 + 66 + 68 + 69 + 66 + 71 + 74 + 66}{10}

$\frac{138 + 72 + 66 + 68 + 69 + 66 + 71 + 74 + 66}{10}$

Step 2.2

Add

138

$138$ and

72

$72$ .

\frac{210 + 66 + 68 + 69 + 66 + 71 + 74 + 66}{10}

$\frac{210 + 66 + 68 + 69 + 66 + 71 + 74 + 66}{10}$

Step 2.3

Add

210

$210$ and

66

$66$ .

\frac{276 + 68 + 69 + 66 + 71 + 74 + 66}{10}

$\frac{276 + 68 + 69 + 66 + 71 + 74 + 66}{10}$

Step 2.4

Add

276

$276$ and

68

$68$ .

\frac{344 + 69 + 66 + 71 + 74 + 66}{10}

$\frac{344 + 69 + 66 + 71 + 74 + 66}{10}$

Step 2.5

Add

344

$344$ and

69

$69$ .

\frac{413 + 66 + 71 + 74 + 66}{10}

$\frac{413 + 66 + 71 + 74 + 66}{10}$

Step 2.6

Add

413

$413$ and

66

$66$ .

\frac{479 + 71 + 74 + 66}{10}

$\frac{479 + 71 + 74 + 66}{10}$

Step 2.7

Add

479

$479$ and

71

$71$ .

\frac{550 + 74 + 66}{10}

$\frac{550 + 74 + 66}{10}$

Step 2.8

Add

550

$550$ and

74

$74$ .

\frac{624 + 66}{10}

$\frac{624 + 66}{10}$

Step 2.9

Add

624

$624$ and

66

$66$ .

\frac{690}{10}

$\frac{690}{10}$

\frac{690}{10}

$\frac{690}{10}$

Step 3

Divide

690

$690$ by

10

$10$ .

69

$69$