3.din prima poza
2 3/4= 11/4
3 4/5=19/5
4 5/6= 29/6
(11/4 * 4 + 19/5 *5 +29/6 * 6) /( 4+5+6)= (11+19+29)/15=59/15 = 3,9(3)
4.din prima poza
1 zi 4500 x0,(4)=4500x 4/9= 2000 kg
rest 4500 -2000=2500 kg
a 2-a zi 2500 x0,4=1000 kg
rest 2500-1000= 1500 kg
a 3-a zi 1500 x 0,25 =375 kg
rest 1500-375 = 1125 kg
4. din poza a 2-a
1 2/3 = 5/3
2 3/4 =11/4
3 4/5=19/5
(5/3 *3+11/4 *4 + 19/5 *5) / (3+4+5)=(5+11+19)/12=35/12=2,91(6)
6.din poza a 2-a
media ponderata
(1x10+3x30) /(1+3)=100/4=25⁰
