Question

repede va rog ,macar cat puteti

Answer 1

notam: a-nr tricouri albe
b- nr tricouri rosii
c-nr tricouri albastre
x- nr total
a= 30/100*x= 3*x/10
b= 20/100*a= 1/5*(3*x/10)=3*x/50
c=320
3*x/10 + 3*x/50 + 320=x amplificam la prima cu 50, la a doua cu 5 si la ultima cu 50 si ecuatia devine 50*x= 15*x +3*x+ 16000 => 50*x= 18*x +16000 => 32*x= 16000=> x= 16000/32 =>x= 500
a= 3*x/ 10 => a= 3*500/10= 150
b= 3*x/50=> b= 3*500/50= 30