Question

Calculati media ponderata a numerelor :
a) 1,(3) si 3 intregi si 1\3 cu ponderile 3 si respectiv 6
b) 1\2;1,3(8) si 0,(3) cu ponderile 1,9 si respectiv 6


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Answer 1

a) 1,(3) si 3 intregi si 1\3 cu ponderile 3 si respectiv 6
1,(3)=(13-1)/9=12/9=4/3
3 1/3=10/3
(4/3*3+10/3*6)/(3+6)=(4+20)/9=24/9=8/3=2,(6)

b) 1/2;1,3(8) si 0,(3) cu ponderile 1,9 si respectiv 6
1/2
1,3(8)=(138-13)/90=125/90=25/18
0,(3)=3/9=1/3
(1/2 *1+25/18*9+1/3*6)/(1+9+6)=(1/2+25/2+2)/16=(13+2)/16=15/16=0,9375