Răspuns :
f- fete
b- baieti
t-total
f+b=t
b=12
f=60t/100
12+60t/100=t /*100
1200+60t=100t
1200=100t-60t
1200=40t
t=1200:40
t=30
Deci sunt in total 30 de elevi
b- baieti
t-total
f+b=t
b=12
f=60t/100
12+60t/100=t /*100
1200+60t=100t
1200=100t-60t
1200=40t
t=1200:40
t=30
Deci sunt in total 30 de elevi
Daca fetele reprezinta 60% din totalul elevilor insemna ca baietii reprezinta 40 %.
[tex]12= \frac{40}{100}*x [/tex]
[tex]12 * \frac{100}{40}=x [/tex]
[tex]12* \frac{5}{2}=x [/tex]
5*6=x
x=30 elevi
[tex]12= \frac{40}{100}*x [/tex]
[tex]12 * \frac{100}{40}=x [/tex]
[tex]12* \frac{5}{2}=x [/tex]
5*6=x
x=30 elevi