w-urnie-jest-12-kul-piec-czerwonych-cztery-zielone-i

$\displaystyle \frac{1}{2}$\displaystyle \frac{1}{2}

$\displaystyle \frac{5}{12}$\displaystyle \frac{5}{12}

$\displaystyle \frac{7}{12}$\displaystyle \frac{7}{12}

$\displaystyle \frac{3}{4}$\displaystyle \frac{3}{4}