Решение задачи N4389 теория вероятностей
4389. There are 4 black and 5 white balls in the box. Remove 3 balls at random. What is the probability that 2 of them will turn out to be black?
Detailed solution. Decorated in Microsoft Word 2003 (Quest decided to use the formula editor)
Оплата и выдача товара осуществляются через партнёрскую платформу.