Question

Nota 4 5 6 7 8 9 10
Nr el 2 3 4 5 5 4 2(el=elevi)
Procente=?
a)Calculeaza media clasei
b)Completeaza tabelul , exprimand in procente
Va rog repete dau coronita

Answer 1

vezi atasament
 a fost mai usorde facut punctul a) mai intai
de fapt punctele sunt independente intre ele
 

Answer 2

[tex]m=\frac{4\cdot 2+5\cdot 3+6\cdot 4+7\cdot5+8\cdot5 +9\cdot4+10\cdot2}{2+3+4+5+5+4+2}=\frac{8+15+24+35+40+36+20}{25}=\frac{178}{25}=7,12\\ \frac{p_1}{100}\cdot 25=2\\ p_1\%=8\% \ nota 4 \\ \frac{p_2}{100}\cdot 25=3\\ p_2\%=12\% \ nota 5\\ p_3\%=16 \% \ nota 6\\ p_4\%=20\% \ nota 7\\ p_5\%=20\% \ nota 8\\ p_6\%=16\% \ nota 9\\ p_6\%=8\% \ nota 10 [/tex]