In a box there are 9 balls, 5 of them are white balls and 4 others are red balls so i decided to take 3 balls from the box. What is the probabilty i get at least 1 red ball?
+26367 In a box there are 9 balls, 5 of them are white balls and 4 others are red balls so i decided to take 3 balls from the box.
What is the probabilty i get at least 1 red ball?
\(\begin{array}{|rcll|} \hline && 1-\dfrac{5}{9}*\dfrac{4}{8}*\dfrac{3}{7} \\\\ &=& 1-\dfrac{60}{504} \\\\ &=& \mathbf{\dfrac{444}{504}} \\ \hline \end{array} \)
