Răspuns :
f+b=120
f=20% din b= 20/100* b= 1/5 * b= b/5
b/5 + b=120 aducem la acelasi numitor
b+5b=600
6b=600
b=100
a=120-100
a=20
f=20% din b= 20/100* b= 1/5 * b= b/5
b/5 + b=120 aducem la acelasi numitor
b+5b=600
6b=600
b=100
a=120-100
a=20
notam cu f=femei
b=barbati
f+b=120
f=20% x b= [tex] \frac{20}{100} [/tex]= [tex] \frac{1}{5} [/tex] * b= [tex] \frac{b}{5} [/tex]
[tex] \frac{b}{5} [/tex] +b =120
b+5b=600
6b=600
b=100
f=[tex] \frac{100}{5} [/tex]=20
b=barbati
f+b=120
f=20% x b= [tex] \frac{20}{100} [/tex]= [tex] \frac{1}{5} [/tex] * b= [tex] \frac{b}{5} [/tex]
[tex] \frac{b}{5} [/tex] +b =120
b+5b=600
6b=600
b=100
f=[tex] \frac{100}{5} [/tex]=20