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Răspuns :

Calculam media in oral:

[tex]M= \frac{9+7+8+8+7+10}{6}= \frac{49}{6} =8,16[/tex]

Aflam media cu tot cu teza:

[tex]Media= \frac{8,16*3+8}{4} = \frac{32,48}{4} =8,12[/tex]

Asadar media la matematica va fi 8,12.