Răspuns:
Salut!:)
a)Aduni numarul elevilor participanti:1+2+2+3+6+5+3+3=27 elevi
b)Aduni iar elevii cu cel putin nota 7:6+5+3+3=17 elevi
c)Folosind formula avem:
[tex]\frac{1*3+2*4+2*5+3*6+6*7+5*8+3*9+3*10}{1+2+2+3+6+5+3+3}[/tex]=[tex]\frac{3+8+10+18+42+40+27+30}{25}[/tex]=[tex]\frac{178}{25}[/tex]=7-media clasei.
