Răspuns :
Răspuns:
1+3+5+6+2+2+1=20 elevi
1·4+3·5+5·6+6·7+2·8+2·9+1·10=4+15+30+42+16+18+10=135
135:20=6,75 media clasei la test
1+3+5+6+2+2+1=20
1•4+3•4+5•6+6•7+2•8+2•9+1•10=135
135:20=6,75
Raspuns: B.6,75
Răspuns:
1+3+5+6+2+2+1=20 elevi
1·4+3·5+5·6+6·7+2·8+2·9+1·10=4+15+30+42+16+18+10=135
135:20=6,75 media clasei la test
1+3+5+6+2+2+1=20
1•4+3•4+5•6+6•7+2•8+2•9+1•10=135
135:20=6,75
Raspuns: B.6,75