Question

va rog acest exercitiu​

Answer 1

Răspuns:

a) 9

b)25

c)6,56

Explicație pas cu pas:

a) 1+2+6 = 9 elevi ;

b) nr elevilor = 1+2+6+3+5+4+2+2 = 25 ;

nr elevilor care au obtinut nota peste 6 = 5+4+2+2 = 13 ; regula de trei simpla

25 elevi ____100%

13 elevi______n% ; n = 13x100/25 = 52% ;

media clasei = (1x3+2x4+6x5+3x6+5x7+4x8+2x9+2x10)/25 =

(3+8+30+18+35+32+18+20)/25 = 164/25 = 6,56

/ - supra

x - inmultire