ze-zbioru-liczb-12dots15-wybieramy-losowo-jedna-liczbeniech-p-oznacza

$\displaystyle \frac{1}{5}$\displaystyle \frac{1}{5}

$\displaystyle \frac{1}{3}$\displaystyle \frac{1}{3}

$\displaystyle \frac{4}{15}$\displaystyle \frac{4}{15}

$\displaystyle \frac{2}{5}$\displaystyle \frac{2}{5}