Răspuns :
a/3=b/5=c/10=(a+b+c)/(3+5+10)=72/18 = 4
=> a = 3*4 = 12 ;
b = 5*4 = 20 ;
c = 10*4=40 ;
Proba: 12+20+40 = 72
=> a = 3*4 = 12 ;
b = 5*4 = 20 ;
c = 10*4=40 ;
Proba: 12+20+40 = 72