Resposta:
média= (1*5+2*5+3*5+4*5+5*4+6*4+7*4+8*4+9*2)/(5+5+5+5+4+4+4+4+2)
média= 172/38 = 4,526
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Resposta:
média= (1*5+2*5+3*5+4*5+5*4+6*4+7*4+8*4+9*2)/(5+5+5+5+4+4+4+4+2)
média= 172/38 = 4,526