Question

9, Calcule a media aritmetica simples em cada um dos seguintes casos :
a)15;48;36
b)80;71;95;100
C)59;84;37;62;10
d)1;2;3;4;5;6;7;8;9
e)18;25;32
f)91;37;84;62;50

Answer 1

                n
Media =  ∑ xi/n
               i =1

a)

$\\ M = \frac{15+48+36}{3} \\ \\ M = \frac{99}{3} \\ \\ M = 33$

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B)

$\\ M = \frac{80+71+95+100}{4} \\ \\ M = \frac{346}{4} \\ \\ M = 86,5$

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C)

$\\ M = \frac{59+84+37+62+10}{5} \\ \\ M = \frac{252}{5} \\ \\ M = 50,4$

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D)

$\\ M = \frac{1+2+3+4+5+6+7+8+9}{9} \\ \\ M = \frac{45}{9} \\ \\ M = 5$

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E)

$\\ M = \frac{18+25+32}{3} \\ \\ M = \frac{75}{3} \\ \\ M = 25$

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F)

$\\ M = \frac{91+37+84+62+50}{5} \\ \\ M = \frac{324}{5} \\ \\ M = 64,8$