#include<iostream.h>
#include<conio.h>
void main()
{int v[2008],i,j,c_pos=0,c_fav=0;
for(i=1;i<=2007;i++) v[i]=3*i;
for(i=1;i<=2007;i++)
 if(i%2!=0)
 {c_pos++;
  for(j=i;j<=2007;j++)
   if(v[i]==j)
    c_fav++;
  }
cout<<"Probabilitatea ca un element din {1,3,5,...,2007} sa fie multiplu de 3 este ";
cout<<endl<<"---// "<<c_fav<<"/"<<c_pos<<" = "<<(float)c_fav/c_pos<<" //---";
getch();
}