Basic Math Examples

82

$82$ ,

84

$84$ ,

70

$70$ ,

72

$72$ ,

75

$75$ ,

68

$68$ ,

86

$86$ ,

75

$75$ ,

74

$74$ ,

69

$69$ ,

74

$74$ ,

79

$79$ ,

81

$81$ ,

90

$90$ ,

76

$76$

Step 1

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

\frac{82 + 84 + 70 + 72 + 75 + 68 + 86 + 75 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}

$\frac{82 + 84 + 70 + 72 + 75 + 68 + 86 + 75 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}$

Step 2

Simplify the numerator.

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Step 2.1

Add

82

$82$ and

84

$84$ .

\frac{166 + 70 + 72 + 75 + 68 + 86 + 75 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}

$\frac{166 + 70 + 72 + 75 + 68 + 86 + 75 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}$

Step 2.2

Add

166

$166$ and

70

$70$ .

\frac{236 + 72 + 75 + 68 + 86 + 75 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}

$\frac{236 + 72 + 75 + 68 + 86 + 75 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}$

Step 2.3

Add

236

$236$ and

72

$72$ .

\frac{308 + 75 + 68 + 86 + 75 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}

$\frac{308 + 75 + 68 + 86 + 75 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}$

Step 2.4

Add

308

$308$ and

75

$75$ .

\frac{383 + 68 + 86 + 75 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}

$\frac{383 + 68 + 86 + 75 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}$

Step 2.5

Add

383

$383$ and

68

$68$ .

\frac{451 + 86 + 75 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}

$\frac{451 + 86 + 75 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}$

Step 2.6

Add

451

$451$ and

86

$86$ .

\frac{537 + 75 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}

$\frac{537 + 75 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}$

Step 2.7

Add

537

$537$ and

75

$75$ .

\frac{612 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}

$\frac{612 + 74 + 69 + 74 + 79 + 81 + 90 + 76}{15}$

Step 2.8

Add

612

$612$ and

74

$74$ .

\frac{686 + 69 + 74 + 79 + 81 + 90 + 76}{15}

$\frac{686 + 69 + 74 + 79 + 81 + 90 + 76}{15}$

Step 2.9

Add

686

$686$ and

69

$69$ .

\frac{755 + 74 + 79 + 81 + 90 + 76}{15}

$\frac{755 + 74 + 79 + 81 + 90 + 76}{15}$

Step 2.10

Add

755

$755$ and

74

$74$ .

\frac{829 + 79 + 81 + 90 + 76}{15}

$\frac{829 + 79 + 81 + 90 + 76}{15}$

Step 2.11

Add

829

$829$ and

79

$79$ .

\frac{908 + 81 + 90 + 76}{15}

$\frac{908 + 81 + 90 + 76}{15}$

Step 2.12

Add

908

$908$ and

81

$81$ .

\frac{989 + 90 + 76}{15}

$\frac{989 + 90 + 76}{15}$

Step 2.13

Add

989

$989$ and

90

$90$ .

\frac{1079 + 76}{15}

$\frac{1079 + 76}{15}$

Step 2.14

Add

1079

$1079$ and

76

$76$ .

\frac{1155}{15}

$\frac{1155}{15}$

\frac{1155}{15}

$\frac{1155}{15}$

Step 3

Divide

1155

$1155$ by

15

$15$ .

77

$77$