Resposta:
média aritmética =(1*89+2*86+1*85+12*83+9*82+5*81)/(1+2+1+12+9+5) =82,83
media geométrica= [89*86²*85*83¹²*81⁵ ]^(1/(1+2+1+12+9+5) )
= 22,078637
média harmônica = (1+2+1+12+9+5)/(1/89+2/86+1/85+12/83+9/82+5/81)
= 82,79989
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Resposta:
média aritmética =(1*89+2*86+1*85+12*83+9*82+5*81)/(1+2+1+12+9+5) =82,83
media geométrica= [89*86²*85*83¹²*81⁵ ]^(1/(1+2+1+12+9+5) )
= 22,078637
média harmônica = (1+2+1+12+9+5)/(1/89+2/86+1/85+12/83+9/82+5/81)
= 82,79989