Question

Help la ex 3 plspslslsl​

Answer 1

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:

$\frac{1*3+2*4+2*5+3*6+6*7+5*8+3*9+3*10}{1+2+2+3+6+5+3+3}$=$\frac{3+8+10+18+42+40+27+30}{25}$=$\frac{178}{25}$=7-media clasei.