Question

Calculati media aritmetica ponderata a numereleor:
a) 5,7,9 cu ponderile 6, 3 si respectiv 3
b) 1/4,1/3, 1/5 cu ponderile 4,6 si respectiv 10

Answer 1

(5*6+7*3+9*3)/(6+3+3)=(30+21+27)/12=78/12=39/6=13/2=6,5
(1/4 *4 +1/3 *6 +1/5 *10)/(4+6+10)=
=(1 +2 +2)/20=5/20=1/4=0,25