Question

Calculati media ponderala
a) 2 si 3 cu ponderea 3, si 8; b) 1 supra 2 si 1 supra 3 cu ponderea 4 si 6; c) 3 supra 20; 1 supra 5; 1 si 3 cu ponderea 4; 2; 3 si 5

Answer 1

a[(2x3)+(3x8)]:(3+8)=(6+24):11=30/11
b)[(1/2x4)+(1/3X6)]:(4+6)=(2+2):10=4:10=4/10=2/5
c)[(3/20x4)+(1/5x2)+(1x3)+(3x5)]:(4+2+3+5)=
(12/20+2/5+3+15):14=
(12+8+60+300)/20:14=
380/20:14=19/14