prima zi=2/5 s = 10/25 s= 10s/25
a doua zi= 8/25 s=8s/25
a treia zi=s - 2/5 s - 8/25 s= (25s -10 s - 8s)/25 = 7s/25
a. 7s/25<8s/25<10s/25
a treia zi< a doua zi<prima zi
b. in primele doua zile a vandut 10s/25+8s/25=18s/25
c. in ziua a treia a vandut=7s/25=7·50/25=14 kg
d. ar trebui sa vanda 50kg/3=16 2/3 kg=16,(66) kg pe zi