Question

Se amesteca 100kg mere a 5lei/kg cu 120kg mere a 4lei/kg cu 130kg mere a 3lei/kg si cu 40kg mere a 6lei/kg .
Cat costa un kg de amestec?

Answer 1

1kg mere.....5 lei
100kg mere....x      x=500 lei

1kg mere.....4 lei
120kg mere.....x    x=480 lei

1kg mere.....3 lei
130kg mere.....x      x=390 lei

1kg mere......6 lei
40kg mere......x      x=240 lei

In total, se amesteca 100+120+130+40=390kg mere.
1 kg amestec costa 500+480+390+240=1610 lei.

Answer 2

100*5+120*4+130*3+40*6=500+480+390+240=1610
1610/(100+120+130+40)=4.12 sper ca nu am gresit