Find the Mean (Arithmetic) 100 , 95 , 90 , 85 , 80

Math
100 , 95 , 90 , 85 , 80
The mean of a set of numbers is the sum divided by the number of terms.
100+95+90+85+805
Cancel the common factor of 100+95+90+85+80 and 5.
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Factor 5 out of 100.
5⋅20+95+90+85+805
Factor 5 out of 95.
5⋅20+5⋅19+90+85+805
Factor 5 out of 5⋅20+5⋅19.
5⋅(20+19)+90+85+805
Factor 5 out of 90.
5⋅(20+19)+5⋅18+85+805
Factor 5 out of 5⋅(20+19)+5(18).
5⋅(20+19+18)+85+805
Factor 5 out of 85.
5⋅(20+19+18)+5⋅17+805
Factor 5 out of 5⋅(20+19+18)+5(17).
5⋅(20+19+18+17)+805
Factor 5 out of 80.
5⋅(20+19+18+17)+5⋅165
Factor 5 out of 5⋅(20+19+18+17)+5(16).
5⋅(20+19+18+17+16)5
Cancel the common factors.
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Factor 5 out of 5.
5⋅(20+19+18+17+16)5(1)
Cancel the common factor.
5⋅(20+19+18+17+16)5⋅1
Rewrite the expression.
20+19+18+17+161
Divide 20+19+18+17+16 by 1.
20+19+18+17+16
20+19+18+17+16
20+19+18+17+16
Simplify by adding numbers.
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Add 20 and 19.
39+18+17+16
Add 39 and 18.
57+17+16
Add 57 and 17.
74+16
Add 74 and 16.
90
90
Find the Mean (Arithmetic) 100 , 95 , 90 , 85 , 80

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