Basic Math Examples

97

$97$ ,

77

$77$ ,

99

$99$ ,

77

$77$ ,

52

$52$ ,

51

$51$ ,

97

$97$ ,

58

$58$ ,

73

$73$ ,

62

$62$ ,

52

$52$ ,

52

$52$

Step 1

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

\frac{97 + 77 + 99 + 77 + 52 + 51 + 97 + 58 + 73 + 62 + 52 + 52}{12}

$\frac{97 + 77 + 99 + 77 + 52 + 51 + 97 + 58 + 73 + 62 + 52 + 52}{12}$

Step 2

Simplify the numerator.

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Step 2.1

Add

97

$97$ and

77

$77$ .

\frac{174 + 99 + 77 + 52 + 51 + 97 + 58 + 73 + 62 + 52 + 52}{12}

$\frac{174 + 99 + 77 + 52 + 51 + 97 + 58 + 73 + 62 + 52 + 52}{12}$

Step 2.2

Add

174

$174$ and

99

$99$ .

\frac{273 + 77 + 52 + 51 + 97 + 58 + 73 + 62 + 52 + 52}{12}

$\frac{273 + 77 + 52 + 51 + 97 + 58 + 73 + 62 + 52 + 52}{12}$

Step 2.3

Add

273

$273$ and

77

$77$ .

\frac{350 + 52 + 51 + 97 + 58 + 73 + 62 + 52 + 52}{12}

$\frac{350 + 52 + 51 + 97 + 58 + 73 + 62 + 52 + 52}{12}$

Step 2.4

Add

350

$350$ and

52

$52$ .

\frac{402 + 51 + 97 + 58 + 73 + 62 + 52 + 52}{12}

$\frac{402 + 51 + 97 + 58 + 73 + 62 + 52 + 52}{12}$

Step 2.5

Add

402

$402$ and

51

$51$ .

\frac{453 + 97 + 58 + 73 + 62 + 52 + 52}{12}

$\frac{453 + 97 + 58 + 73 + 62 + 52 + 52}{12}$

Step 2.6

Add

453

$453$ and

97

$97$ .

\frac{550 + 58 + 73 + 62 + 52 + 52}{12}

$\frac{550 + 58 + 73 + 62 + 52 + 52}{12}$

Step 2.7

Add

550

$550$ and

58

$58$ .

\frac{608 + 73 + 62 + 52 + 52}{12}

$\frac{608 + 73 + 62 + 52 + 52}{12}$

Step 2.8

Add

608

$608$ and

73

$73$ .

\frac{681 + 62 + 52 + 52}{12}

$\frac{681 + 62 + 52 + 52}{12}$

Step 2.9

Add

681

$681$ and

62

$62$ .

\frac{743 + 52 + 52}{12}

$\frac{743 + 52 + 52}{12}$

Step 2.10

Add

743

$743$ and

52

$52$ .

\frac{795 + 52}{12}

$\frac{795 + 52}{12}$

Step 2.11

Add

795

$795$ and

52

$52$ .

\frac{847}{12}

$\frac{847}{12}$

\frac{847}{12}

$\frac{847}{12}$

Step 3

Divide.

70.58 ¯ 3

$70.58\overline{3}$

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.

70.6

$70.6$