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Calculati media arihmetica a nr: 19,5 ; 8,67 ;14,13 si 7
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Răspuns :

(19+15):2=34:2=17.
(8+67):2=75 supra 2.
(14+13+7):3=34 supra 3.
Ma=(19,5+8,67+14,13+7):4
Ma=49,3:4
Ma=12,325