Question

MATEMATICA
UN ELEV ARE URMATOARELE MEDII ANUALE: 7,67; 8; 8,33; 9; 9,33; 7,33; 8,67; 10; 7,67; 8; 9; 10. Calculeaza media acestora ( cu doua zecimale )
AJUTATI-MA VAAA ROG

Answer 1

daca adunam toate aceste medii este egal cu103
103:12=8,58 (media)

Answer 2

Ma=(7,67·2+8·2+8.33·1+9·2+9,33·1+7,33·1+8,67·1+10·2)/(2+2+1+2+1+1+1+2)
Ma=(15,34+16+8,33+18+9,33+7,33+8,67+20)/12
Ma=103/12=8,58(3)